The World's 11 Best Underground Springs & Spas

1.Krabi: Tiger Cave Temple, Emerald Pool and Hot Springs Tour

★★★★★★★★★★4.8 · 3,616 reviews · 9 hours - 570 minutes · from $59Our pick

Spend nine hours visiting Krabi’s Emerald Pool, Blue Lagoon, hot springs, and Tiger Cave Temple in a small group of up to nine. Guides such as Arun, AB, Tan, and Oly are known for clear explanations and helpful photos. Expect a comfortable van, included entry fees, and a serious stair climb.

“AB, our guide, was fantastic. Very funny and easy to talk to. The emerald pool was beautiful, hot springs like a bath and the view at the top of the Tiger Cave was just wow. The stairs are a challenge so definitely bring a bottle of water with you, you can refill it at the top. Definitely worth the money!”

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2.Krabi: Tiger Cave, Hot Springs and Emerald Pool Jungle Tour

★★★★★★★★★★4.2 · 2,643 reviews · 8 - 9 hours · from $48

Spend 8 to 9 hours exploring Krabi’s rainforest, thermal pools, Emerald Pool, and Tiger Cave Temple. Guides such as Sky, Micky, Max, and Duncan are praised for clear instructions and friendly help. Expect a Thai buffet lunch, hotel transfers, and 1,260 steep steps to the summit.

“Really enjoyed it all! Make sure you wear comfy shoes for the tiger cave temples”

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3.Prague: Beer and Wine Spa Bath with Salt Cave Experience

★★★★★★★★★★4.7 · 396 reviews · 1 hour · from $93

At Beer Baths Letna, you spend an hour in a warm tub filled with dark beer or wine ingredients, with Bernard beer or Prosecco to drink. A spa assistant such as Max, Gabbie, or Tatyana explains the treatment, then you unwind in Prague’s largest salt cave.

“Great experience! Beer was good, bath was relaxing, and the staff was very friendly! Would definitely recommend to anyone to experience.”

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4.All day Krabi Jungle Tour (Hot Spring Water, Emerald Pool, Tiger Cave Temple)

★★★★★★★★★★4.5 · 323 reviews · from $71

Spend about nine hours exploring Krabi’s inland sights with a small group of up to 20 people. Soak in Namtok Ron’s hot pools, walk to Emerald Pool, enjoy a generous Thai lunch, then face the steep climb at Tiger Cave Temple. Guides such as Mimi and Abhi are known for warm, helpful service.

“A long van trip through traffic from Ao Nang beach, more roadworks than normal. Once we got there 3 trips were different Hot springs very unusual the the Emerald pool which was great for a swim, finally after another hours drive we visited The Tiger cave and temple 🛕 1290 steps tok much for us oldies in that heat 🥵 but we had a good walk”

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5.Discover Krabi – Emerald Pool, Hot Springs & Tiger Cave Temple

★★★★★★★★★★5.0 · 296 reviews · from $37Top rated

Spend a full day inland from Ao Nang, swimming at Emerald Pool, soaking at Namtok Ron hot springs, and visiting Tiger Cave Temple. English-speaking guides such as Otto and Timm are praised for friendly help, but the 1,260-step climb and extra entrance fees require planning.

“Great tour with Otto. The Blue pool experience and swimming in Emarald pool. The hot steam pool was such an amazing feeling 😍 🙌. Our last tour was Tiger Cave Temple. What an adventure! Climbing those steps to the top was very hectic, but fulfilling.”

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6.From Sofia: Rila Monastery and Optional Museum, Cave or Spa

★★★★★★★★★★4.6 · 270 reviews · 8 - 9 hours · from $35Best value

Travel from Sofia to UNESCO-listed Rila Monastery with an English-speaking guide, then choose the National History Museum, monastery museum, Saint John’s Cave, or mineral springs. Expect a long day, limited food choices, and a short but steep cave walk if selected.

“Toni was great , it is a small group so everyone felt treated, rila is a beautiful place and the guide was informative , definitely recommend.”

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7.Reykjavik: Lava Cave, Hot Springs, Horses & Waterfalls Tour

★★★★★★★★★★4.8 · 130 reviews · 10 hours · from $222

Travel from Reykjavík into Borgarfjörður with an English-speaking guide, stopping at Glanni, Deildartunguhver, Reykholt, Hraunfossar, and Sturlureykir Horse Farm. The main event is a guided walk through Viðgelmir Lava Cave, where lava colors and winter ice formations reward sturdy shoes and warm layers.

“Addi was our guide and we went beyond to make us comfortable and provided vert interesting tidbits about Iceland and it's history. Each stop was beautiful and something otherworldly! the caves of course was absolutely amazing! Highly recommend this tour”

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8.Ao Nang: Hot Springs, Emerald Pool, and Tiger Cave Day Tour

★★★★★★★★★★4.2 · 90 reviews · 6 hours · from $41

Join Love Nature Krabi Travel and Tours for a 6-hour minivan trip from Ao Nang, Krabi Town, and nearby areas. Visit the Emerald Pool, soak in forest hot springs, and tackle Tiger Cave Temple’s 1,237 steps with an English-speaking driver such as Bass. Entrance fees are extra.

“We loved going in the hot springs and swimming at the Emerald Pool. The Tiger Cave Temple was also very interesting. Lunch was provided and we got water. All was great!”

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9.Hoover Dam Kayaking Trip, 6 Hot Springs, 6 Caves, 4 Waterfalls

★★★★★★★★★★5.0 · 25 reviews · 7 to 9 hours (approx.) · from $333

Paddle from the base of Hoover Dam to Willow Beach with Adventure Child LLC. You’ll visit geothermal tunnels, hot springs, slot canyons, waterfalls, and Emerald Cove. Guides including Cameron, Johnny, EJ, and Sean lead private groups in English, with kayaks and safety gear provided.

“Going to a tour with this company is a great. I had a tour kayaking down the colorado river from hoover dam with Johnny as guide and it was the best kayak trip ever. Johnny show is every thing you can see on the river, waterfalls, hidden hot springs coves and more. I really will use this service again”

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10.Martvili Canyon Prometheus Cave And Hot Springs From Batumi

★★★★★★★★★★5.0 · 20 reviews · 10 to 12 hours (approx.) · from $65

Travel from Batumi to Martvili Canyon, Prometheus Cave, and Nokalakevi Hot Springs with hotel pickup, transport, WiFi, and an English-speaking guide. Guides may include Nini, Mari, Natia, or Giorgi. Expect a long day, optional boat rides, extra entry fees, and time in sulfur-rich water.

“Excellent trip organised by National Georgiagraphic ……. Giorgi provided us a private trip …. Although we booked for group tour .”

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11.Krabi Private Escape: Emerald Pool, Hot Springs & Tiger Cave

★★★★★★★★★★4.5 · 19 reviews · 8 hours

Spend eight hours with a private driver visiting Krabi’s Emerald Pool, Hot Stream, and Tiger Cave Temple. You set the pickup time and pace, with round-trip transport from Krabi, Ao Nang, or Khlong Muang. The driver speaks English and Thai, but this is not a guided tour.

“The hot springs were okay, the Emerald pool was nothing to see very boring we walked all the way with is 2km to the top pool and it was not worth it at all. The tiger cave was a hard walk to the top but we did it for an amazing view. If I was doing again I’d just get a taxi to tiger cave and not bother with the rest.”

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