The world's best underground attractions
The world's best underground attractions Dinosaur Caves, USA The San Luis Obispo County stretch of the Californian coast is home to a world of arches, caves, grottos and rock gardens that are only accessible from the water. Visitors can explore their watery depths on an exhilarating three-hour excursion with Central Coast Kayaks – some of the caves run up to 30 feet deep. If you’re lucky you’ll spot seals, otters and dolphins as you paddle through the North Pacific. Raufarhólshellir lava tunnel, Iceland Just outside Reykjavík, you can walk through a 100 foot-wide tunnel formed as a lava tube in a volcanic eruption more than 5,000 years ago. In some places the roof has caved in and natural light – and snow – floods in. Elsewhere, impressive lighting highlights the colours and geological formations. If you're...