Henry Doorly Zoo, Omaha, Nebraska:
Omaha’s famous zoo boasts the Desert Dome – the largest indoor desert in the world, which spans 84,000 square feet and is home to a variety of vegetation and a colony of critters. Travelers can also take in the Lied Jungle, a rainforest setting featuring cascading waterfalls and monkeys jumping from tree to tree. “It’s a wonderful education for children and adults,” commented a TripAdvisor traveler. Admission costs $13.50 for adults (ages 12 and up), $12.50 for seniors, and $9 for children (ages three to 11); children under two get in for free.