Skyscraper powered by wind turbines attached between its towers.

This beautifully historic Bahrain fortress might not be the most popular attraction around, but that might make it all the better.

The inventor of a number of hybrid corn species is immortalized with a field of giant corn.

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 Manhattan skyscraper is a reminder of the brief but glorious age of urban air taxis.

Visit the monolithic tomb of America's most famous general.

A bit of retro transportation flair preserved in the world's largest department store.

A crumbling hospital from the 1850s on Roosevelt Island.

A popular European tradition makes its way to the states on one of America's most famous bridges.

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

One of only two commuter aerial tramways in the United States.

Elevated freight railway turned wildly successful urban park.

A Milanese café entirely designed by the American director Wes Anderson.

A space dedicated to contemporary art and culture, co-chaired by fashion icon Miuccia Prada.

The secret medieval communication system will whisk your words above the noise of the crowd.

Small on the outside, big on the inside, this church is an astonishing act of visual deception.

Two very green residential towers cleaning the air in one of Europe's most polluted cities.

An ossuary built in 1210 to collect bones from the Ospedale Maggiore of Milan.

Venice's island of the dead.

The small peaceful island off the Venice tourist circuit is where the city began more than 1,500 years ago.

Stare out over the lagoon and beyond from this 10th-century campanile on the island where the city of Venice began.

This community on a small Venetian island has taken to painting their houses in bright neon hues.

Built to repay the sins of the father, this church is home to one of the most valuable works of Western art.

A monument to the three wars that led to German unification towers within a Berlin traffic circle.