The Houston Museum of Natural Science is one of the most attended museums in the nation, with annual attendance reaching over 3 and a half million. See why with a General Admission voucher that lets you visit anytime you wish. With numerous permanent exhibits that include the McGovern Hall of the Americas, Cullen Hall of Gems and Minerals, Wiess Energy Hall and the brand new Hall of Paleontology, there's no way you can visit without being entertained, enthralled and educated. Your self-guided tour of the HMNS Exhibit Halls can take as little as 30 minutes or be an all-day event. Your ticket even includes return visit privileges for the entire day if you want to go and refuel before exploring some more.