Rock climbing in Halong Bay is a fantastic experience and the legendary Bay is a famous destination for rock climbers from all over the world. There are over 3,000 limestone cliff islands and karsts that rise from the bay providing climbers with the outstanding climbing territory. There are several boat tours in Halong Bay that will take visitors out to these majestic climbing areas. A few popular places to climb include `The Cave` on Cat Ba Island which features 7 different climbing routes, Ben Beo Wall which overlooks the main fishing harbor and features the highest concentration of hard rock climbs on the island with 7 routes.