This modest post office sits on the site of H.H. Holmes' famous murder castle.

A hot dog stand where the heads are just as hot as the dogs.

Chicago's North Park Village was once the largest municipal sanatorium in the country.

Cemetery featuring rare glass-fronted columbarium.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

This alley in downtown Chicago held the bodies of over 600 people after the fateful Iroquois Theatre fire.

This $3 million model train takes you through Chicago, Seattle, and the thousands of miles in between.

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

A shining sculpture made of 3,115 lights, the number of visible stars in the Northern Hemisphere.

What's left of the ruins of the 1893 Columbian Exhibition, or World's Fair, also known as the White City.

This historic hotel invented the chocolate brownie.

The only Bahá'í house of worship in North America and one of only a handful worldwide.

Though strikingly beautiful, Seattle's other railway station is now largely forgotten.

A gothic church spire sits atop this skyscraper, the tallest church in the world.

This fast-food outlet is the only space and UFO-themed McDonalds in the world.

A haunting statue called "Eternal Silence" has quite the reputation among visitors with active imaginations.

An homage to everyone's favorite prehistoric cartoon family.

A wall of chewing gum moonlights as collective art.

This glamorous old building is said to have inspired the Tower of Terror.

Historic funicular railway, believed to be the shortest railroad in the world.

A century-old hotspot for jazz, frequented by everyone from Charlie Chaplin to Al Capone.

A colorful architectural gem in Seattle’s uniquely modern Central Library.

An enormous park-like oasis, full of famous Chicagoans’ graves.

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