Did you know that Sevilla is a wonderful example of how cities can transform from car-oriented to more people-oriented places through the implementation of strong policies to encourage cycling? In just 3 years, the City has gone from 6,000 daily bicycle uses to more than 66,000!
You can rent bikes all over the city, and use its bike-paths almost all over the city. It's a great way of getting in shape and enjoying the great weather that the city has to offer, especially during the spring months!
Here is a link that will help you get familiar with biking in Sevilla!