New Houston Botanic Garden is 132-acres of plants, hiking trails, water features and morePublished: September 15, 2020, 4:58 pmHouston Botanic Garden is a 132-acre plant museum with hiking trails, water features, and a family discovery center, and opens to the public this Friday. It’s located at the site of the old Glennbrook Golf Course, right across I-45 from Hobby Airport. Lauren Kelly got a sneak peek from President and General Counsel, Claudia Gee Vassar.