This sprawling bookstore spans four floors and has more than a million books in stock.

Detroit’s downtown castle is one of the oldest structures in the city.

The world’s largest Masonic temple was saved by the White Stripes.

The collection of ceremonial and cultural objects spans many countries and hundreds of years.

World's largest Christmas store.

A wacky two-story folk-art assemblage of carved and found objects, with lights, motion, and sound now in need of financial support.

A collection of human remains, animal body parts, and other macabre curiosities all legally for sale.

The Victorian-era greenhouse is stuffed with tropical plants, and open 365 days a year.

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

Enormous small-business mecca in the Midwest, serving dozens of artists.

This bronze sculpture on a former squash court marks the secret origins of the Atomic Age.

The unluckiest U-boat in the entire German fleet is now on display in a Chicago museum.

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

An avant garde art museum at the University of Chicago.

This historic hotel invented the chocolate brownie.

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

A Bibliophile's Dream.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

“Invented in Key West, Perfected in Brooklyn."

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.

A collection of more than 12,000 shoes, displayed in a building shaped like a shoebox.

A museum of magic with a Sadist past.