Since cheetah shoes don't yet exist and a tree stump with a saddle on it is hopelessly immobile, bicycles remain the best way to tour a city. See the sights in two-wheeled fashion with today's Groupon: for $12, you get an all-day bicycle rental from Alamo Bike Shop (up to a $30 value).
Alamo Bike Shop provides bike rentals, repairs, and parts to get tourists and locals alike cycling merrily through the streets of San Antonio. Rentals allow explorers to choose from an inventory of quality comfort cruisers and K2 mountain bikes. To keep cyclists' heads safe, Alamo Bike Shop outfits renters with helmets as well as locks to prevent cycles from sneaking off to go hunting for armadillos. Kids 10 years and older can also get a bike rental suited to their smaller size; Alamo Bike Shop requires all riders younger than 18 don helmets to protect developing noggins. Potential pedalers can check the shop's site for a list of San Antonio attractions to explore on rented wheels, including the San Antonio Museum of Art, Brackenridge Park, or that great trash can on Elmira Street.