The seamy, underground secrets of Portland's criminal past.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

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

The unique traffic pattern named for an influential urban planner is also known as the Pedestrian Scramble.

One of the most influential presidents in U.S. history wanted only this plain, elegant monument as his lasting memorial.

At 929 pounds and 26 feet tall, this stainless steel fork can only be used by the likes of King Kong.

Legend has it that President Grant’s frequent drinking in the lobby gave rise to the term “lobbyist.”

A line of blue paint marks the route of the inaugural parade.

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

A surreal statue honoring Prague's favorite literary son.

The remains of a historic plantation nestled in between a parking lot and the rental car return at Reagan National Airport.

Fittingly, America's museum of architecture is itself a magnificently designed old building.

Medicinal spa created from the mineral-rich runoff of a geothermal power plant

This valley of hot springs and boiling mud pots is home to the record-holding "Geysir," which originated the English word.

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

In an odd geographic anomaly this city borders two different states on opposite sides of town.

Thanks to a quirk of elevation this gift shop produces magic doughnuts that are found nowhere else on Earth.

While most of the games in this arcade take quarters, that would have been a small fortune when they were made.

The nude sculpture on this fountain shocked conservative townsfolk when it was first unveiled, but not as much as the dead body found in it decades later.

Look closely and you’ll notice that the color changes a third of the way up the tower.

One critic described it as "middle Mussolini, early Ramses, and late Neiman-Marcus." Another called it an architectural "natural disaster."

A hidden gem on the lawn of the U.S. Capitol Building designed by landscape architect Frederick Law Olmsted.

A 200-year-old bar in the historic French Quarter refuses to give up its place in history, nor its role in securing ours.