Olbrich Botanical Gardens, Madison

Spread out across 16 acres, the award-winning outdoor displays at Olbrich Botanical Gardens showcase both Midwest-hardy plants and floras native to the world's tropical forests. Water lilies and dragonflies occupy the Perennial Garden's 200-foot stream, whereas a boardwalk snakes through the Rain Garden's flood-tolerant plants. Elsewhere, guests can marvel at the pavilion in the Thai Garden, which nine Thai artisans reassembled after it traveled to Olbrich by sea and rail for seven weeks.

Inside the Bolz Conservatory's 50-foot-high glass pyramid, temperatures kept at between 65 and 95 degrees Fahrenheit maintain a steamy atmosphere for more than 640 tropical plants, a waterfall, and free-flying birds. Along with its plentitude of plants, Olbrich Botanical Gardens hosts a range of classes and events, which include concerts, botanical-themed art exhibits, and the annual Blooming Butterflies exhibit.