City Museum in St. Louis, MO defies explanation. It’s like one of those indoor habitrail-like mazes…but times a factor of a billion. A mad, creative, artistic vision. No maps, no rules…other than don’t get trapped. Inside, outside, between walls, in the ceiling—there are tunnels and areas to explore all over the place. Kids can have the run of the place. Adults, beware—it can get awfully claustrophobic. Pretty much impossible to discover everything here in a day. Never seen anything like it.