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

A diminutive plaque recalls the treetop sniper who almost killed Abe Lincoln.

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

An easily overlooked memorial to a Ukrainian famine-genocide that killed over 4 million people.

These recently uncovered walls are all that's left of Washington, D.C's first defense contractor.

There's a crumbling old mansion inside the Smithsonian National Zoo.

An Industrial Revolution-era public work that purified water using nothing but sand.

The national park was once a plantation estate.

The United States Capitol's former columns still stand.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

There's a 12-foot-tall replica of the Washington Monument hidden under a manhole nearby.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

Enormous piles of historically significant stones, dumped by Congress in a forest, and abandoned for 60 years.

Franciscan monks created a facsimile of the Holy Land for North Americans who couldn’t afford the trip overseas.

Giant sand sculptures of famous people and places are on display near the Tottori sand dunes.

In the northernmost city in the world, it's illegal to be buried because it’s too cold for bodies to decompose.

The eerie remnants of an ancient forest were hidden under the sand for centuries.

Unknown to many, this sparkling turquoise lake hides amid Oregon's snowcapped mountains.

This lovely little burbling creek is actually a deadly waterway that has dragged down everyone who ever set foot in it.

Ethereal alien hums and haunting whale songs emitting from...a giant sheet of vibrating metal?

The bad-ass ride of a soul legend, housed in one of the world's few soul museums.

Mass graves and Victorian monuments mark the history of Memphis in this 19th century cemetery.

The juke joint where legendary soul artists ate, drank, and made merry.

Home to drunken tower-climbing goats... seriously.