This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

Built to house a chapter of the Knights Templar, this grandiose building is a relic of Freemasonry in Chicago a century ago.

Fragments of architectural wonders from around the globe are embedded in the newspaper building's walls.

The history of funerals and funerary customs.

The rodent-shaped sidewalk imprint that earned worldwide media attention.

Pumpkin-like gargoyles and grotesques peer down from the rooftop of this unassuming apartment building in Illinois.

You have to love a museum with a truly dedicated focus. A focus on Superman, for example.

Don't blink or you'll miss it.

A century-old miner's quarters turned mansion.

During World War II this was the site of an "honor camp" used as a prison for draft dodgers, Native American conscientious objectors, and Japanese-Americans—including a man who brought his case against the camp to the Supreme Court.

One of the best-preserved ghost towns in Arizona speaks to the difficulties of establishing mining towns in the 19th century American West.

More than 25 fully functional scale replicas of famous lighthouses dot the shores of Lake Havasu.

This once-booming Gold Rush town is now home to a herd of feral donkeys.

This huge dam across the Colorado River caused an armed standoff between two U.S. states.

The eroded core of an ancient volcano is now accessible by a short hike.

This Arizona observatory is famous for investigations into Martian life, and as the place humans first spotted Pluto.

Ancient pueblos built into the base of a natural canyon wall.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

This famous bridge twisted itself into oblivion, but not for the reason you might think.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

A curious collection dedicated to human and animal anatomy and pathology.

A public urinal so pretty, it was declared a national monument.

Established in 1638 to battle the Black Death, Hortus Botanicus Amsterdam is a treasure trove of rare flora.

The former headquarters of history's oldest megacorporation.