Stockholm's tiniest statue is of a small boy looking at the Moon.

An ancient Viking runestone hidden in plain view in Stockholm's old town.

It houses the remains of a 17th-century version of the Titanic.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

This stunning concert hall has become a symbol of Iceland's national recovery.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

There must be a pun in this haystack somewhere...

Commemorating the spot where the famous scientist fed his pigeons.

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.

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

The 28-foot granite map plots the locations of 40 theaters in New York City.

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

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

Tucked away amidst some of the most famous addresses in the world is New York's only fraction of a street.

Long the exclusive domain of birds and vagabonds, this little-known Central Park peninsula is open to the public once more.

A small peaceful park and waterfall tucked amid the urban grind of Midtown Manhattan.