Railay Beach and Ton Sai, near Krabi in Southern Thailand, is the most developed climbing area in Thailand and one of the most picturesque locations to climb in Asia. Surrounding limestone cliffs and weathered formations characterise the landscape, attracting climbers of all grades to the crags, overhangs, hanging stalactites and steep, vertical walls. The French grading system is used; there are over 650 routes ranging from beginner (5a) to extremely challenging (8c), with single and multi-pitch routes. 1-2-3 is a good crag that is dominated by beginners and climbing schools with a variety of routes, while the superb Asia's Shadow Play (8a+) is one of the difficult routes at Dum's Kitchen. The Keep has fantastic views with popular climbs, but Andaman Beach or Ton Sai is the serious climbers haunt and the most popular place to climb, with classic routes such as Tidal Wave, Humanity and Eviction. There are several climbing schools like King Climbers who offer courses for all levels.