Fifteen rocks placed in a rectangle of raked white sand, enclosed by an earthen wall — that's it. And yet this 15th-century Zen garden is one of the most analyzed works of art in Japan. No one knows who designed it or what it means, and from any vantage point on the viewing platform, one rock is always hidden from view. You'll sit on the wooden verandah, stare at the stones, and either achieve a moment of genuine clarity or wonder what all the fuss is about. Either way, the garden stays with you long after you leave.