Cleveland's giant "free" stamp is a nod to the Civil War, but was misinterpreted for years.

The largest earthwork effigy in the world.

The inventor of a number of hybrid corn species is immortalized with a field of giant corn.

Where most of the world's flypaper was made.

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

One of the few working locomotive roundhouses in the United States.

This lone tree and dramatic sandstone outcropping are so beloved by Michiganders they can be found on one of the state’s coins.

This shallow cave got its name from copious amount of human bones found inside.

The world's tallest statue of a woman wields the world's tallest sword and is at risk of toppling over.

One of the world's tallest statues is also one of its most hated.

The Nazis lost more men trying to take this Russian-held Stalingrad apartment block than they did when taking Paris.

Gargantuan home of Russian science.

Moscow's imposing monument to the Space Age.

The gorgeous entrances into the city's underbelly look more like grand halls than subway stops.

This spectacular track has run continuously since 1882.

The park is home to the United States's only still-operating Dutch windmill.

A chilling disappearance (and rescue) of a child uncovers a geological mystery.

A charming remnant of 19th-century fishing towns sits on Michigan’s Leelanau Peninsula.

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

A giant Troll lurks under one of Seattle's oldest bridges.

The romance of early commercial flight still fills this Art Deco destination.

The maritime museum that boasts the largest nautical library in the western hemisphere.

Inspired by a foil-wrapped potato, (seriously) the Markel Building has been deemed one of the 10 ugliest buildings in the world.

This 29-ton granite ball spins around at the slightest touch thanks to a scientific phenomenon.