Traveling to Iceland often means chasing waterfalls, glaciers, and volcanoes. But if you’re looking for something a bit more offbeat—an adventure that mixes underground exploration with natural hot springs—this Hot and Cold G Spots Challenge might just be your next favorite day. Based on reviews and tour details, it offers a unique blend of caving and soaking, with a small-group vibe that keeps things intimate and personalized.
What we really like about this tour is how it balances active exploration with relaxing downtime. First, you get to crawl through a handful of icy caves carved out by ancient volcanoes—a surreal experience that feels both adventurous and awe-inspiring. Then, you can wind down in the Reykjadalur Hot Springs, soaking in warm waters with incredible views. The fact that all the necessary caving gear is provided means you can focus on the fun without worrying about equipment. And, with small group sizes—just four people max—you’ll get more attention from your guide, making the whole experience feel more customized.
One thing to keep in mind is that this tour involves some physical activity, including crawling through tunnels, which might not be suitable for everyone. Travelers should have moderate fitness levels and wear heavy-duty clothing and hiking shoes, especially since caving can get a bit muddy or dirty. It’s not a tour for those looking for a leisurely sightseeing day, but if you’re up for a bit of a physical challenge and love natural wonders, this could be perfect.
This experience appeals most to travelers who want a hands-on adventure that combines nature, geology, and relaxation. If you’re traveling with someone who’s fit and curious about underground formations and geothermal springs, this tour offers a memorable, one-of-a-kind day.
Key Points

- Adventure-focused experience with caving and hot springs
- Small group size allows for personalized attention
- All equipment included, so no fuss about gear
- Moderate fitness level recommended due to crawling and hiking
- Stunning scenic views in both caves and geothermal valleys
- Ideal for active travelers who enjoy nature and physical challenges
A Deep Dive into the Tour Experience

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What to Expect from the Itinerary
This tour kicks off early in the morning, starting at 8:30 am, and lasts around 6 to 7 hours, which is quite reasonable considering the mix of activities involved. Your adventure begins on the Reykjanes Peninsula, a region peppered with volcanic landscapes and geothermal activity. Here, you’ll explore between 2 and 4 caves, depending on the group’s pace and fitness level.
The caves are carved by Iceland’s volcanic past, resulting in formations that are both fascinating and sometimes challenging to navigate. The tour is designed to ease you in by starting with the easiest caves, then progressing to more complex tunnels involving crawling and climbing. Each cave offers a different perspective on Iceland’s volcanic history, and some reviews mention how guides share their knowledge of the rock formations and geological sites—a bonus for geology buffs or anyone curious about the land beneath their feet.
After a few hours of underground exploration, the tour transitions to a more relaxing activity: soaking in the Reykjadalur Hot Springs. This scenic spot is nestled in a picturesque valley, where you can submerge yourself in naturally warm streams. The hot springs are included in the tour, and you’ll likely spend around two hours here, giving you plenty of time to unwind and take in the view.
The Caves: A Closer Look
The caves are the heart of this experience. From feedback, it’s clear that the guides excel at making these adventures accessible, regardless of experience. One reviewer called it a “must-do if you are ever in Iceland”, highlighting how “fantastic” the caves are. Because the caves are carved by volcanoes, they feature a blend of sharp rock formations and tunnels that invite curiosity and exploration.
Expect some crawling and climbing—there’s an emphasis on safety and pacing. The equipment supplied includes helmets, headlamps, and protective gear, which means you can focus on the fun rather than worrying about safety. Keep in mind that some of the tunnels might involve getting a little dirty or muddy, so wearing durable, heavy-duty clothing is recommended.
The Hot Springs: Relaxing and Scenic
After the underground adventure, you’ll head to the Reykjadalur Hot Springs —a highlight for many travelers. The setting is stunning, with rolling hills and geothermal activity creating a natural bath experience. The water temperature is warm enough to relax sore muscles, making it an ideal way to wind down after an active morning.
One reviewer described this part as a “charge-your-batteries” moment, and it’s easy to see why. The combination of warm waters and gorgeous scenery often earns this tour rave reviews; travelers appreciate the chance to connect with nature in a truly authentic way.
Practical Details and What to Keep in Mind

The tour is priced at $270 per person, which, considering it includes all equipment, a professional guide, and hot springs admission, offers good value. The small group size—a maximum of four travelers—means more personalized attention and a less crowded experience, which many find enhances the adventure.
You’ll be picked up from your Reykjavik accommodation or designated meeting point, making logistics straightforward. The tour also offers group discounts—a nice perk if you’re traveling with friends.
Since the tour involves some physical activity, travelers should have moderate fitness levels. It’s recommended to wear hiking shoes and clothing that can get dirty, especially for the cave portion. Weather can influence the experience, so check the forecast as adverse conditions could lead to cancellations or adjustments.
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Cancellation & Safety Policies
You can cancel the tour for free up to 24 hours in advance. The tour is weather-dependent, so if conditions aren’t suitable, you’ll be offered a different date or a full refund. This flexibility is reassuring, especially in Iceland’s changeable climate.
Authentic Traveler Feedback: What People Say

The glowing reviews tell us a lot about what makes this tour special:
- One reviewer raved about how their guide “shared knowledge of rock formations and geological sites” while crawling through caves.
- Another called it “a very unique experience” that combines adventure with comfort, thanks to the guide and well-organized itinerary.
- Several mentioned how the scenery was breathtaking, and the hot springs session was a perfect way to relax after the caves.
These comments suggest that expert guides and stunning landscapes are the tour’s main highlights, along with the sense of achievement from conquering underground tunnels.
Who Would Love This Tour?

If you’re someone who enjoys hands-on experiences and physical activity, this tour is a great fit. It’s ideal for travelers who want to go beyond surface-level sightseeing and really get a sense of Iceland’s volcanic heart. The small group size makes it suitable for those who prefer a more intimate, personalized adventure.
It’s worth noting that this tour isn’t designed for those who prefer a relaxed, sit-back-and-watch kind of day. The walking and crawling demand at least moderate fitness, so if you’re not comfortable with physical activity, you might want to consider other options.
Final Thoughts

The Hot and Cold G Spots Challenge offers a memorable way to experience Iceland’s extraordinary natural features—caves carved by volcanoes and geothermal hot springs in a scenic valley. The tour’s strength lies in its expert guides, intimate group size, and the chance to combine adventure with relaxation.
For travelers hungry for something different, and willing to get a little muddy and active, this tour delivers authentic, hands-on Icelandic fun. It’s a great choice for those who want to see both the underground and geothermal sides of the land of fire and ice in one fulfilling day.
Hot and cold G spots challenge
“Absolutely loved this adventure! Our guide was awesome and we had the best time, the caves were fantastic. Must do if you are ever in Iceland 10/10…”
FAQ

Is this tour suitable for children?
This tour is designed for individuals with moderate physical fitness and involves crawling through tunnels, so it may not be suitable for young children or those with mobility issues.
What should I wear for the tour?
Heavy-duty clothing that can get dirty and hiking shoes are recommended, especially since caving can be muddy and the terrain uneven.
What’s included in the price?
The price covers all necessary caving equipment, a professional guide, and admission to the Reykjadalur Hot Springs. Food is not included, but the tour mentions a classic Icelandic hot dog lunch.
How many people are in each group?
A maximum of four travelers means you’ll get a more personalized experience, with plenty of opportunity for questions and interaction.
Can I cancel this tour if my plans change?
Yes, you can cancel for free up to 24 hours before the tour, subject to availability and weather conditions.
What happens if the weather is bad?
Since the tour is weather-dependent, poor conditions may lead to cancellations or rescheduling. If canceled, you’ll be offered a different date or a full refund.
Do I need to be experienced in caving?
No prior experience is necessary, but you should be comfortable with moderate physical activity and crawling.
How long does the tour last?
The entire experience runs about 6 to 7 hours, giving you enough time for both cave exploration and soaking in the hot springs.
Is transportation provided?
Yes, pickup from your Reykjavik accommodation or a designated meeting point is included to make logistics easier.
Whether you’re craving underground adventure or a peaceful soak in geothermal waters, this tour offers a balanced and authentic Icelandic experience. If you’re ready to embrace the land of fire and ice with a twist of exploration, it’s well worth considering.
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