Part of an abandoned19th-century fortress hides in plain sight inside a modern office building.

One of the largest busts in the world celebrates the German city's erstwhile namesake.

An unassuming, powerful monument north of the U.S. Capitol bears witness to the resilience of Japanese Americans during a time of grave injustice.

Formerly the most gerrymandered district in the U.S., it twisted and turned along racial borders.

Decades before the scandal, this staircase on the river was a literal "water gate."

Human skulls and a stuffed goat made into a rocking chair can be found at this strange little store.

The most accurate timepiece in the world.

This working class sculpture pounds his hammer all the livelong day.

Everything you always wanted to know about borates is here.

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

There’s a hidden military meme engraved on the World War II Memorial.

The sculptor was instructed to add “stallion attributes” to the general's bronze mare.

An overlooked memorial honoring the local Washington residents who died in World War I.

An abandoned network of military bunkers and tunnels open for anyone willing to descend into the darkness.

An enormous image of Utah's salt flats made entirely from tape.

This monument remembers the first Japanese Americans forcibly relocated during World War II.

It turns out that a hurricane-prone beach is probably not the best place to house wild animals.

A massive hydrovolcanic explosion left a half-mile wide crater in Death Valley.

These charming mailboxes became social media stars after a typhoon failed to topple them.

Gnarled canopies of pink and purple wildflowers arch over the trail to the summit.

The enormous 250-room Vanderbilt mansion conceals hidden doors and secret passageways.

Given just one more year to live, Conrad Schuck built his dream house in Bartow, Florida.

This giant iron playfully pays tribute to an early 20th-century architectural trend.

Four abandoned towers hidden above the Douglas fir forest in Washington.