Enormous lake at the bottom of a unique cave system.

This funicular railway rumbles along for a mile up the nearly vertical face of Chattanooga’s Lookout Mountain.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

This historic train station has been converted to a locomotive themed hotel.

A bizarre roadside attraction and the first instance of miniature golf in the world.

The bad-ass ride of a soul legend, housed in one of the world's few soul museums.

Once decrepit and slated for demolition, now one of the longest pedestrian bridges in the world.

Every day a troupe of pampered water fowl walk the red carpet to their favorite fountain.

A modern mechanical planetary system, part of a 10,000 year clock.

San Francisco's oldest surviving monument and meeting place for 1906 survivors.

A working model of the entire San Francisco Bay and much of the Sacramento River Delta, complete with regular tides that change every 14 minutes.

A crumbling wizard is one of the final reminders of a roadside Middle Earth.

A historic house in St. Louis was plagued by a series of suicides committed by family members involved in a successful brewery.

The first rural cemetery west of the Mississippi is home to the elaborate tombs of St. Louis' local beer barons.

This recently restored timepiece has stood all around Kansas City.

One man's unrequited love stands in a glass box forever.

This titanic oil company sign is a reminder of the Americana boom of the 1970s and also its commoditization.

One of few surviving standpipe water towers in the U.S.

What was meant to be a temporary exhibit is now a permanent fixture at the St. Louis Zoo filled with beautiful birds.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

A chessmaster's dream destination.

The Magic House provides a beautiful and creative environment for curious youngsters to get their knowledge on.

Where the author wrote her beloved "Little House" books.

Speak to a companion on the other side of the room loud and clear through this architectural anomaly.