The irony of souvenirs is how forgettable they often are, yet out-of-town visitors invariably want something. Lead them to Williamsburg for keepsakes that won’t end up in the trash. At Spuyten Duyvil bar, there’s good draft beer, a nice garden, and a collection of original New York City subway signs for sale ($30 to $140; 359 Metropolitan Ave., nr. Havemeyer St., Williamsburg, Brooklyn; 718-963-4140). Most are antique pieces—the black-and-white variety dates from the twenties—that sell for much less than they do in Manhattan. And the shipping store nearby on Bedford Avenue is handy for delivery purposes. To find more offbeat souvenirs, click ahead.