A stone slab in Madrid marks the point from which the distances of Spain's national roads are measured.

A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

This newly renovated Soviet-era outdoor exhibition center is bigger than the principality of Monaco.

These slanted cubic abodes are a creative if odd solution to a zoning pickle.

This elaborate towering structure was once famed for its revolutionary height.

"Holy Wisdom" overlooks the city that became its namesake.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

Sofia's legislative center is continuously reinventing itself.

A striking symbol of the Bulgarian capital.

One of the most enjoyable bits of history at Coney Island and “the most romantic ride in the world.”

This 1967 experiment in modular architecture was designed to be a new model for urban living.

Leave a button on the jacket of this iconic Seattle clown.

A museum dedicated to the history and exploration of both popular music and science fiction.

Portlandia is the second-largest copper repoussé statue in the United States.

Four, 18-foot-tall badminton shuttlecocks lie scattered about the lawn of a Kansas City museum.

The first car-centric shopping plaza in the U.S. brought a little bit of Spain to downtown Kansas City.

Community bookshelf of 25-foot-tall book spines.

Statue of Lenin, from Cold War era Czechoslovakia, now in a neighborhood of Seattle.

A turn of the century building boasting some of the most beautiful art nouveau architecture in Prague.

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

The design of this beautifully crafted building was inspired by Norwegian glaciers.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

The mortal remains of a Russian prince, priest and paranormal investigator who came to America in 1792.