One of the region's most famous attractions is the rack-and-pinion Snowdon Mountain Railway, with some of its track at a thrillingly steep grade. The 3,560-foot-high Snowdon—Yr Wyddfa in Welsh—is the highest peak south of Scotland and lies within the 840-square-mile national park. Weather permitting, trains go all the way to the summit; on a clear day you can see as far as the Wicklow Mountains in Ireland, about 90 miles away. You can take two types of train:
a modern diesel-driven version, or the brand-new "heritage" version, complete with restored carriages and working steam engine. Tickets can sell out early on busy days, so try to book.