The Best Sight in The Museum District, Rice University, and the Texas Medical Center, Houston and Galveston

This small but pleasant zoo is home to 4,500 animals, housed in carefully designed ecosystems along shaded trails. Be sure to visit the boardwalks and treehouses of the Wortham World of Primates. If you need a break from the heat, take a spin on the climate-controlled Wildlife Carousel near the Children's Zoo. The zoo is free on certain holidays: Memorial Day, July 4th, Labor Day, the Friday after Thanksgiving, and Martin Luther King Jr. Day.