The dramatic cliff-top castle of Culzean (pronounced ku-lain) is the National Trust for Scotland's most popular property. Robert Adam designed the neoclassical mansion, complete with a walled garden, in 1777. The grounds are enormous, combining parkland, forests, and a beach looking out over the Atlantic Ocean; the surprisingly lush shrubberies reflect the warm currents that explain the mild climate. There are caves in the cliffs; tours are occasionally available.
In the castle itself you can visit the armory, luxuriously appointed salons and bedchambers, and a nursery with its lovely cradle in a boat. Adams's grand double spiral staircase is the high point of its design. There's a free audio tour, and guided tours are available daily at 11 and 2:30. A short walk through the woods brings you to the visitor center with shops and a restaurant.