For a slice of yesteryear, Emperor Norton's Fantastic San Francisco Time Machine leads visitors on a journey to days gone by, when a brash local legend unofficially ruled the City by the Bay. Your colorfully dressed guide will take you on a leisurely stroll along two fascinating miles in just under three hours. Make reservations in advance. These quirky tours sell out quickly, and run Thursdays and Saturday, leaving from Union Square. The Sunday Waterfront tour leaves from the Ferry Building.