Olbrich Botanical Gardens comprises 16 acres (6.5 hectares) of outdoor gardens and a conservatory that amazes with countless tropical plant species. The outdoor gardens, which are generously free to the public, feature a Thai Pavilion, Rose Garden, Herb Garden, and more. A modest entrance fee to the Bolz Conservatory uncovers a world of exotic flowers, flowing water features, and circling birds, all of which are housed in a 50-foot (15.2-meter) glass pyramid that is kept as humid as a Caribbean island. Offering wheelchair-accessible walkways, the Olbrich Botanical Gardens welcomes all to meander its serene spaces.