Founded in 1974, the center consists of a boardwalk through forest and marshes, live animal displays, bison and prairie platforms and butterfly gardens. The center also includes the "Martyn", "Karankawa", "Marsh", "Lady Bird" (named after Lady Bird Johnson) and "Prairie" nature trails that allow visitors to see forest, prairie, marsh and natural bayou habitats once common in the Houston and Galveston region.
The center was named in honor of Armand Yramategui, a Houston environmental advocate who died in 1970. Yramategui, concerned about the increasing urban growth around Armand Bayou, worked to have the land remain a wilderness. Following Yramategui's death, fellow environmentalist and friend Hana Ginzbarg became the bayou's advocate for the Bayou Preservation Association. Her activism and work through the Bayou Preservation Association, Outdoor Nature Club, and other organizations was instrumental in creating the Nature Center.