The Underground is open to the public from 6 a.m. to 8 p.m. Monday-Friday, except for several federal holidays. Ninety-Nines Museum of Women Pilots Where: 4300 Amelia Earhart Drive, Suite B.

Oklahoma City boasts its share of strange attractions, including eccentric museums, bizarre zoo animals and the state's first cat cafe. From a skeleton museum to the world's largest cattle market ...