With its crumbling old castle and low-slung buildings framed by lolloping green hills, Hay-on-Wye is a beautiful little place. In 1961 Richard Booth established a small secondhand bookshop here. Other booksellers soon got in on the act, and now there are dozens of shops. It's now the largest secondhand bookselling center in the world, and priceless 14th-century manuscripts rub spines with "job lots" selling for a few pounds.
For 10 days every May and June, Hay-on-Wye is taken over by its Literary Festival, a celebration of literature that attracts famous writers from all over the world. (Bill Clinton, himself an attendee, once called it "the Woodstock of the mind.") Plan ahead if you want to attend, as hotels get booked several months in advance.