The crown jewel of the Queens Museum is a nearly 10,000-square-foot architectural model of the city originally built for the 1964 World's Fair.

Each of these gorgeous, intricately decorated rooms is painstakingly crafted to the scale of 1 inch: 1 foot.

The prototype for all Nazi concentration camps.

This "floating railway" is one of the world's oldest monorail systems.

The largest bell in the world has been swinging high above a Cologne cathedral for almost a century.

Known as the "Cross At The Crossroads," this massive metal cross is just short enough to avoid the FAA.

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.

Equal parts record-breaking temple to consumerism and bizarre fun park, it's more than you think it is...

A Borgesian work of art that may blur the line between fiction and reality a little too convincingly.

The only arched bridge made of stone on the entire Mississippi River.

When flour explodes, it's not a pretty sight.

Downtown Minneapolis mixed art and function by turning some of their sewer covers into works of art.

These pretty kitties killed and ate as many as 135 railway workers.

G.V. Black, the Father of Modern Dentistry, keeps an eternal eye on Chicagoan’s teeth from his perch in Lincoln Park.

At Chicago's revered Field Museum, visitors are invited to learn about and literally explore DNA.

A goddess-topped water fountain in Chicago was created thanks to the dreams of a thirsty newsboy.

Robots, lasers, and whoopee cushions, oh my!

This striking art museum holds an amazing series of curiosity cabinets.

Disney World's very first waterpark is now an abandoned ruin being reclaimed by the swamp.

The culprit who accidentally lit this 3,500-year-old tree on fire stated "I can't believe I burned down a tree older than Jesus."

An octet of classic chrome trailers speared into the ground act as a tribute to the silver bullets of the open road.

Stepping away from the glitz of mobsters and casinos to learn about the other history of Vegas.

Neoclassical bank designed by NY architects Helmle & Huberty.