This restored house is like a time capsule of the president's unconventional inauguration.

A mysterious air force base built to resemble a Long Island fishing village.

A former poultry store that looks like a giant duck and is one of the "seven wonders" of Long Island.

A large camera obscura, constructed entirely from digitally fabricated components.

Four-story concrete hotel never opened to customers.

The king of U.S. high points towers over every other peak on the continent.

A morbid gateway to an Alaska town prides itself on the hunting history it represents.

Buy your friend a drink or staple some cash to the wall for the next guy at the Salty Dawg Saloon.

"The Most Boring Road in the State."

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

A sharp bend in a dramatic river canyon cut through red rocks.

Running under an entire mountain, the longest highway tunnel in North America is kept fresh using portal fans and jet fans.

This small city where almost everyone lives in the same building can only be reached via North America's longest tunnel.

During the summer, surfers in Alaska take advantage of this inlet’s unusual water patterns.

The oldest inn in Kilkenny was established by the first convicted witch in Ireland.

The ruins of a medieval monastery named after a type of tree.

One of Ireland's most infamous prisons for rebels including men, women and children.

At Monet's beloved home you can still see the Japanese bridge, waterlilies, and weeping willows that were the subjects of some of his most iconic paintings.

Site of a classic 19th-century physics experiment to prove the earth is rotating.

This demon atop the Notre-Dame de Paris looks utterly bored.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

A series of abstract, silly sculptures represent the works of a great modern classical composer.

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.