This old residential building was once the largest flour mill in the world.

No one knows how many bodies are in this vault in a Chicago public park.

To find the "unicorns of the deep" you've got to go downstairs.

Where dioramas can follow you home.

A towering Art Deco movie palace made to look like a Mayan temple.

An unexpected but incredible collection of wildlife dioramas spanning rainforests, swamps, forests, and plains.

Located within a historic park, the beacon is the oldest standing structure in Miami.

Go inside to really appreciate this 500-year-old technological masterpiece.

The only visible reminders of an elaborate engineering project that kept the tower from reaching the tipping point.

Two stone columns flank the grand Venice square, but there were supposed to be three.

The remains of a Rockefeller's lush Italianate estate hidden in the underbrush on the coast of Lake Michigan.

This sprawling mini-golf empire is an impressive testament to a disappearing attraction.

This morbid, delightful curiosity shop offers everything from animal bones to human teeth.

Shop of curiosities with a dinosaur museum tucked in its basement.

More than 8,000 drinking jugs say “Cheers!” to a guy named Toby.

The capital of the Cayman Islands is a center of offshore banking, but gets battered by blistering hurricanes.

A building so large that it has its own weather.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

The original vault that held the president's remains still stands, empty, not far from where he was finally buried.

20,000 pieces in a Frank Gehry-designed building.

For 32 years the famous Ringling Bros circus troupe spent winters in this sunny spot in Florida.

A theme park attraction designed to turn your children into LARPers.

Affectionately known as "Lord Bot," this historic statue has a cult social media following and rightly claims to be “the most metal inhabitant of the Wren Yard.”

A collection of over 2000 air-moving devices of all kinds displayed in the Fanimation headquarters.