Bok Tower Gardens is celebrated as a "sanctuary of plants, flowers, trees and wildlife [that] has been something of a local secret for years," says Frommer's, boasting almost 50 acres of gardens, mazes of wandering paths, and the renowned 205-foot Singing Tower, filled with 60 bells. Two can spend the day at this National Historic Landmark for $15, and get a $5 credit to the on-site cafe, regularly $29.