This abandoned prison castle has become an imposing gallery of graffiti art.

Undone by Prohibition, this abandoned brewery-turned-flour mill is now ready for its third act.

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

This recently restored timepiece has stood all around Kansas City.

The "World's Largest Underground Business Complex," a 55,000,000-square-foot city underneath Missouri.

This erect, phallic geological spire wasn't always named so domestically.

Storage units with a wartime past.

Two hundred tons of pioneer artifacts were painstakingly recovered from a shipwreck at the bottom of the Missouri River.

Hamburgers are intensely proud of their tunnel beneath the river.

In an odd geographic anomaly this city borders two different states on opposite sides of town.

Fittingly, America's museum of architecture is itself a magnificently designed old building.

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

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

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

The fairy tale castle of the "fairy-tale king."

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

Home to Hollywood history and a very special salt crystal.

The world's longest known cave system.

The farm where one of America's greatest leaders was raised is now a well-appointed landmark.

In this relatively flat state the highest point is an honored place.

The massive, original Colgate Clock is mounted on a defunct factory building that was once a prison.