On our first day my friends and I were looking for a way to travel around downtown San Antonio since we didn't realize until the last day that everything was closer than we thought. We decided since we hadn't ridden bikes in forever we were going to give it a shot. We did some research and found B-Cycle. It was amazing! You purchase a day membership for $10 and it lasts 24 hours. You take a bike out of a station and then ride! The only catch is that you need to check in to a station (can be the same station) every 30 minutes, otherwise you get charged $2 for every 30 minutes you don't check in. There are stations throughout the city. I highly recommend riding around. It is a lot of fun, great exercise, and gives you a chance to see the city in a different way.