Raufarhólshellir, located just 30 minutes from Reykjavík, is one of the longest and most famous lava tubes in Iceland. Visitors can explore this unique underground world that was formed by a volcanic eruption over 5000 years ago. The cave offers various tours, including standard tours with impressive lighting, adventurous Lava Falls tours, and evening tours for those looking to experience the tunnel in a different light. With ice sculptures in winter and stunning rock formations year-round, Raufarhólshellir promises an unforgettable experience for nature enthusiasts and adventure seekers alike.