The history of the treatment of mental illness, illustrated in all its gory detail, and housed in an asylum.

This art deco masterpiece was once a miracle spring mecca but is now simply a government office building.

A piece of John the Baptist in the American heartland.

This otherworldly church spire reaches up toward the heavens.

A 20-foot-tall egg painted in a traditional Czech patterns by the Czech community in Wilson, Kansas.

A recreation of the doomed ocean liner in the middle of the Smoky Mountains.

Railroad came. People came. Railroad left. Town died.

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

One of America’s oldest and spookiest hotels, thanks to the residency of ghosts, dead presidents, and Alfred Hitchcock.

A six-ton, 12-foot-tall concrete prairie dog is touted as the largest in the world.

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

A bronze statue on a downtown corner honors Minneapolis's favorite career gal.

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

An impressive collection of over 50,000 minerals including moon rock from the Apollo 17 mission.

The body of St. John Neumann and his collection of hundreds of relics, on display in a Philly church.

This elaborate towering structure was once famed for its revolutionary height.

This little-known collection holds everything from "Dracula" notes, to the manuscript of "Ulysses," to the forged works of Shakespeare.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

World's first "penitentiary," meant to be humane, drove men insane.

Museum celebrating the ocean, with the largest wunderkammer dedicated to sea exploration.

An original apothecary from 1792.

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

This stunning blue and gold room changed cities twice before becoming part of the Smithsonian.

Before founding the American Red Cross, Clara Barton had a tremendous humanitarian impact by locating thousands of missing soldiers.