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For spelunkers and potholers, Iceland has scores of caves, large and small,
deep and shallow, to be explored. Some caves may be explored without a guide and many
agencies offer cave exploration tours for others.

Summit Adventure Guides - Vatnshellir Cave
The cave itself is an 8000 year old lava tube created by volcanic eruption from a nearby crater in the Purkhólar crater family. As the lava rushed down the hill in a lava river it began to cool on the surface, creating a crust on top of the lava river. As the eruption stopped, all the lava from underneath this crust continued to drain out. That eventually left behind empty tube with roof on top that gradually cooled down. We offer 45 minute guided tours to Vatnshellir cave. It is one of the most easily accessible cave in Iceland, however you need to be reasonably fit to participate. Exactly how fit is difficult to say, but if you can walk up 2-3 story building without stopping and if you don't have trouble walking on uneven surfaces you should be fine. You need to dress warmly for the cave tour, since the temperature is just above freezing throughout the year. Hiking shoes/boots are recommended but sneakers are acceptable. We will not permit high heels or flat-bottom shoes including flip-flops for this activity. Gloves are recommended for your safety and comfort. If you fall down, gloves can save your hands from the knife-sharp lava rock! We offer this tour all year around, opening hours depend on the season though.From May 15th to September 30th: Daily at 13:00, 14:00 and 15:00. 
The Cave
Hailed as the mightiest of Iceland's caves, its diversity and grandeur is unrivalled. This makes for an experience not to be forgotten. Just shy of 1600 meters / 5250ft, the cave features amazing colours and lava formations that lurk in the depths of the earth. We offer a family friendly tour that all generations can enjoy, thanks to our all new signature walkway and feature lighting. For those who desire more physical activity we offer a half day tour to the caves end.  Caves are often dark, tight and uninviting places; how ever this is not the case in Víðgelmir lava cave. What used to be slow traveled rugged terrain is now easy and enjoyable. Leading from one great hall to the next our path is lit slightly flowing through this magical underworld.

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Kraftganga Lækjargata 4 101 Reykjavík 899-8199
Iceland Untouched Meistaravellir 11 107 Reykjavík 696-0171
Arctic Advanced Þorláksgeisli 47 113 Reykjavík 777-9966
GJ Travel Vesturvör 34 200 Kópavogur 5205200
Iceland is Hot / Come to Iceland Norðurvangur 44 220 Hafnarfjörður 775-0725