Hay-on-Wye, Wales is often described as “the town of books” thanks to its large collection of bookstores and libraries, and none are more magnificent than Honesty Bookshop, a 24-hour open-air bookshop on the grounds of Hay Castle. The books, which are kept in bookcases against the castle wall, are paid for through a small letterbox. Elsewhere on the castle grounds, a mansion built in the 1660s is used for second-hand book sales.