This unreal Portuguese palace looks as though it's made from a pile of different castles.

A 16th century chapel decorated with bones, skulls, and entire bodies hanging from the wall.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

Immortalized in bronze, this frazzled student will be glued to his screen for centuries.

The only example of a Paris Métro sign in use at a subway station outside of the French capital. 

City law dictates that this mountaintop cathedral containing the heart of a saint is to remain the tallest building in town.

This boulder commemorates thousands of Irish immigrants that were victims of "ship fever."

Two thirds of this Montreal neon icon has survived to flash another day.

Montreal's colorful subway station shows its support of the local LGBT+ community.

This public art pays homage to the baseball legend and civil rights icon and his time in Montreal.

This outdoor gallery of graffiti-covered walls pays homage to the past, present, and possible future of street art.

Centuries-old hoofprints and wagon tracks reveal themselves after a good winter storm.

This beautiful Cape Cod beach offers dazzling views and an interesting historical footnote.

This church built atop a gas station promises to "equip you for the next stage in your life’s journey."

Parking garage where Bob Woodward met Watergate source "Deep Throat."

At 207 feet, one of the world's longest continuous escalators.

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

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

A much-maligned monument to teetotalism.

It was once the base for a series of domestic terror attacks.

While most wind tunnels test scale models, the "Cave of Winds" was large enough for actual airplanes.

A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.

The modern birthplace of Irish freedom.