When we hear “cave in Thailand”, many of us immediately think of the dramatic Tham Luang rescue in 2018. The story, featured in numerous films, including a Netflix production, moved the entire world. This complex rescue operation, aimed at freeing a football team trapped in a flooded cave – twelve boys and their coach, 13 people in total – became a symbol of the strength of the human spirit, but also the unpredictability of nature. The boys rescued from the cave in Thailand will forever remain in our memories. But is that all Thailand has to offer underground?

Definitely not. The underground world of the Land of Smiles contains hundreds of spectacular caves, each like a gateway to another dimension. Full of majestic rock formations, prehistoric mysteries, and extraordinary inhabitants. Come on, let me take you on a journey that goes far beyond the beaten track and sunny beaches. Let’s discover this underground kingdom together, where time flows differently, and every step deeper into the earth is a new, fascinating story. I’ve put together a list of absolute gems for you, places that make an incredible impression, take your breath away, and stay with you long after you leave.

The most famous caves in Thailand that you simply must see

Phraya Nakhon: the royal pavilion in the heart of the mountain

Imagine a vast cave chamber with a collapsed ceiling from centuries ago, creating a natural window to the sky. Precisely at noon, a beam of light falls through this opening, illuminating the intricately decorated royal pavilion of Khuha Kharuehat (and no, this isn’t a scene from Indiana Jones, though it would fit perfectly). This is Phraya Nakhon cave, considered one of the most beautiful in Asia. You’ll find it within Khao Sam Roi Yot National Park, so it’s slightly off the main tourist trails, about 50 km south of Hua Hin. The pavilion itself was built in honour of King Rama V, who visited the spot in 1890 and was absolutely enchanted by it. Interestingly, the structure was built in Bangkok, then disassembled, transported, and reassembled in the heart of the mountain.

Just getting there is an adventure. You can choose a trek over the hill, which takes about 2 hours, or take a boat to Laem Sala beach, from where a steep, 400-metre climb awaits. In fact, it’s not so much a climb as a proper scramble up slippery, limestone steps. The effort in the humid climate, where temperatures reach 34°C, is fully rewarded by that absolutely magical sight.

Tham Lod: a bamboo raft journey through three chambers

Located in the mountainous Mae Hong Son province, Tham Lod cave is something entirely different. The Nam Lang River flows through its centre, so you explore it on bamboo rafts. You float in the semi-darkness, with a local guide holding a gas lamp as the only source of light. The silence, broken only by the splash of water, creates an amazing atmosphere. The cave has three main chambers. The first, Tham Sao Hin (Pillar Cave), is breathtaking with its massive stalactites and stalagmites. The second is Tham Tukkata (Doll’s Cave), where prehistoric paintings of deer can be seen on the walls. The last chamber, Tham Phi Man – named after the ancient coffins discovered here – is a place that really makes you ponder the fate of the people who left them. It’s unknown whether they were victims of some catastrophe or simply a burial site.

Bat caves in Ratchaburi and a natural evening spectacle

As the sun dips below the horizon, a show begins near the town of Ratchaburi. From Tham Khang Khao cave, a countless, winding river of millions of bats flies out to hunt. As one tourist I spoke to put it: “It’s like the mountain is breathing out a black, living river.” While the spectacle itself lasts only about fifteen minutes and the smell of guano can be… intense, the sight is absolutely mesmerising and worth any inconvenience. At the same time the bats leave the cave, hundreds of thousands of swifts return, creating an incredible, chaotic dance in the sky whose dynamism is indescribable. It’s a great option for a day trip from Bangkok. A similar, though smaller, spectacle can be seen at Nanyang Bat Cave near Hua Hin.

Tham Luang and the story that moved the world

There’s probably no one who hasn’t heard of Tham Luang cave in Thailand. It was here in 2018 that the dramatic incident took place. The sudden flooding of the cave by monsoon rains cut off the children trapped inside with their coach from the outside world. When it was reported that they were missing boys from the local football team, the search began. Anyone who has ever been stuck even in a simpler cave can imagine their fear. The whole world held its breath, following the complicated rescue operation in which international divers played a key role. Unfortunately, the operation was not without casualties – one of the Thai divers died during the preparations. The question of who would manage to get the trapped boys out was on everyone’s mind around the globe. Today, although access to its deeper parts is rightfully restricted, the place has become a destination for people who want to pay tribute to the rescuers and the saved. It’s a powerful reminder that nature can be unpredictable and always demands humility from us.

How to plan such an expedition? A few practical tips

Alright, so how do you go about all this to ensure the adventure doesn’t turn into a series of hardships? To fully enjoy your visit and avoid unpleasant surprises, it’s worth thinking about a few things. From transport and budget to what to pack in your backpack.

Getting there, or how to reach from Bangkok, Hua Hin, or Chiang Mai

Logistics are key. The easiest way to get to Phraya Nakhon is probably from Hua Hin, which is about 50 km away. You can hire a scooter or arrange with a local driver. From Bangkok, it’s a longer day trip. For Tham Lod cave, it’s best to set off from the charming town of Pai (approx. 50 km) or from Chiang Mai (approx. 180 km). When I was last working on describing similar routes, I came to the conclusion that the Mae Hong Son loop, where Pai is located, is one of the most beautiful motorbike routes in all of Asia. To Ratchaburi to see the bats, the train from Bangkok is a great and cheap option; the journey takes about two hours.

Costs: how much does it all cost?

And now, money. What are the approximate prices? Generally, Thailand is quite kind to the wallet, but it’s worth knowing what to expect. Entry to Khao Sam Roi Yot National Park, where Phraya Nakhon is located, costs 200 baht (THB) per person. If you decide to take a boat to skip the trek, there will be an additional cost of 200 THB for the entire boat. At Tham Lod, visiting is only possible with a guide, and a trip through all three chambers with a raft ride costs about 500 THB per person (which was just under 20 US dollars in 2023, so quite reasonable). Remember that one guide takes a maximum of 3 people. If you’re travelling by scooter, petrol prices in Thailand are about 40-50 THB per litre.

What to pack in your backpack, or a small explorer’s essential kit

Good equipment is key to comfort and safety. Here is a list of things you absolutely must have:

• Comfortable, non-slip footwear: Trekking on slippery rocks is standard. Forget flip-flops. In fact, burn them before you go if you plan anything more than lying on the beach. Trainers or hiking boots are a must.
• Water and snacks: Effort and humidity quickly dehydrate you. Carry a supply of water.
• Torch: Preferably a headtorch so you have your hands free. And a small request – please don’t throw a light show for the bats or swifts; shining lights directly into their eyes causes them immense stress.
• Sun protection: The path to the caves often leads through open areas. Sun cream, a hat, and sunglasses are essential.
• Camera: The views are incredible, so it would be a shame not to capture them.
• Cash: In many places, especially at ticket offices and small stalls, paying by card is out of the question.

Where to stay? Recommended bases in Pai and Hua Hin

Choosing a good place to stay can save your entire trip. If your goal is Phraya Nakhon, the best choice will be Hua Hin. It’s one of the oldest resorts in Thailand, popular among European tourists, has well-developed infrastructure, and offers accommodation for every budget. And if you’re drawn north towards Tham Lod, there’s only one answer: Pai. This laid-back, small village in the heart of the jungle is known for its relaxing atmosphere, picturesque river, and charming riverside bungalows.

A journey into the depths of time, or archaeological treasures and royal traces

Entering a cave in Thailand isn’t just going underground. It’s almost like an expedition to the bottom of the ocean – a journey deep into time and mystery. The stable microclimate and isolation have made them ideal time capsules, preserving traces from thousands of years ago.

Tham Lod: not just a river, but a time capsule

Humans lived in Tham Lod long before anyone thought about building pyramids. Archaeologists claim that representatives of the homo sapiens species might have sought shelter here as far back as 40,000 years ago. The most evidence was left by the Hoabinhian Stone Age culture. What was found? A whole host of things: from simple stone axes, through bone tools and pottery fragments, to food remnants indicating that people learned to cultivate plants over time. The most moving discovery, however, is a skeleton, over 20,000 years old – this makes Tham Lod one of the key archaeological sites in this part of Asia.

But that’s not all. In the deepest chamber, called “Pi Man”, prehistoric coffins made from large teak logs, several thousand years old, were discovered. To this day, they raise questions about the beliefs of the people who placed them there. In the second chamber, ancient paintings of deer have survived on the rock walls, a simple window into the prehistoric world.

King Rama V’s royal visit to Phraya Nakhon

This is no ordinary hole in the ground. Phraya Nakhon has a royal stamp of approval, quite literally. The visit of King Chulalongkorn (Rama V) in 1890 completely transformed the place. Apparently, the monarch, known for modernising Siam and his love for nature, was so delighted by the cave that the Khuha Kharuehat pavilion was erected inside in his honour. This visit made the cave famous and gave it the status of a site of national importance, a symbol of harmony between nature’s artistry and human elegance.

What awaits you inside? An extraordinary world and… quite a bit of effort

Entering a cave is crossing the threshold into another world. Everything changes: temperature, humidity, sounds, and light. Inside, an art gallery awaits you, where the only artist is nature. Over millennia, water filtering through limestone rocks has sculpted fantastical forms. Stalactites hang from the ceiling, and stalagmites grow up from the floor towards them, forming mighty columns when they meet, like pillars of an underground cathedral. It might seem that nothing lives in such darkness. Wrong. Caves are home to many species, mainly bats and agile swifts, which use echolocation to navigate in the dark. And although not everyone likes them, the local ecosystem would collapse without them – they control the insect population (especially those annoying mosquitoes!).

However, you need to be prepared for some effort. This is not a walk in the park. It’s an adventure that often requires fitness. You’ll face trekking over uneven terrain, climbing steep steps slippery with moisture, and moving along wooden walkways. All this in a cool, but very humid microclimate. If you are ready for such an effort, the satisfaction of reaching your destination and admiring the hidden wonders will be immense.

Every cave tells a different story, or why it’s worth going underground

Going into a cave in Thailand isn’t just ticking off another spot on the map. It’s a journey into the earth and into the depths of history. Each of these places offers a completely different experience. Phraya Nakhon is royal splendour and a play of light, Tham Lod is a mystical river journey through chambers full of secrets, and Ratchaburi is an unforgettable spectacle of nature. There are also other wonders, like the famous Emerald Cave, where you swim through a dark tunnel to discover a paradise lagoon. These underground worlds show another face of the Land of Smiles – raw, mysterious, and incredibly powerful.

So, if you’ve had enough of beaches and city hustle, try stepping off the beaten track. Quite literally. It’s there, in the silence and semi-darkness, that you can feel the true spirit of adventure and touch history dating back tens of thousands of years.