One kilometer of thick brass rod laid out before your eyes.

Pulled from the rubble of one of the worst modern tragedies, a steel crossbeam became a symbol of hope for New Yorkers.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

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

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

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

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

A room in New York City that contains 250 cubic yards of dirt worth a million dollars.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

Elevated freight railway turned wildly successful urban park.

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

Some 80,000 Delft Blue tiles line the inside of this Amsterdam walkway.

Established in 1638 to battle the Black Death, Hortus Botanicus Amsterdam is a treasure trove of rare flora.

After local authorities changed the design, the building's architect, Le Corbusier, wanted nothing to do with it.

In the summer of 1957, a massive architectural exhibition showed off the future of urban living in this German neighborhood.

A socialist building dedicated to teachers showcases one of the largest Soviet mosaics in the world.

Dine at a legendary after-hours joint frequented by David Bowie and Iggy Pop.

You've probably seen these distinctive orange-tiled columns on the big screen.

The walls of Germany's Parliament still show the scars of the Red Army takeover in World War II.

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

The largest prehistoric cemetery on the Balearic Islands dates back over 2,500 years.

An enormous public square and parade ground built to celebrate Ghana's independence.

This Dakar museum exhibits artworks and artifacts honoring the daily lives of Senegalese women.