One of the place to visit is the Alamo,a historic Spanish mission and fortress compound founded in the 18th century by Roman Catholic missionaries. The famous Alamo traces its roots to 1718 when Franciscan padres founded a Spanish mission that was originally called San Antonio de Valero. Another favorite spot is San Antonio's centerpiece, the River Walk, set below street level, this is a beautiful area with calm waters, graceful bridges, birds, and plenty of shade from large trees towering over the banks. Most people come down here for a stroll, or to enjoy a meal on one of the outdoor patios. Less than 30 minutes from San Antonio is Natural Bridge Caverns, the largest commercial caves in Texas. These spectacular caves are known for their huge open rooms but they also have narrow passages and interesting formations.