The Real LegoLand.

A whimsical sensor instrument for Minneapolitans to play on their walks to work.

20,000 pieces in a Frank Gehry-designed building.

Former villa and estate of James Deering developed to preserve native tropical forests.

An abandoned water sports stadium that has become a haven for graffiti and decay.

A unique sculpture calls the outside of this steakhouse home.

Walk along the medieval fortifications that have been protecting Tallinn since the 14th century.

A secluded art gallery hidden within the cellars beneath Tallinn’s medieval monastery.

Rubbing the buttons along this statue's coat is considered good luck.

Collapsing castle on the Hudson river was once the storage site of military surplus business.

A modern day curiosity cabinet.

One of the world's tallest waterfalls wasn't revealed to the world at large until 2006.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

Centuries-old bridges grown from tangled roots.

A fiery crater has been burning in the Karakum Desert since 1971.

An abandoned saucer-shaped monument in the Bulgarian mountains.

This lakeside bunker complex in Mamerki, Poland, housed the Supreme Military Command of Nazi Germany during World War II.

Henry Ford's failed rubber plantation in the middle of the Amazon rain forest.

The ghostly remains of an accidental sea.

These disused steel furnaces are now haunting ruins that may one day be a national park.

The internal railway of one of the biggest steel plants in America has been transformed into a linear park with unique industrial views.

The graffitied ruins stand hidden within the Pennsylvania woods.

A collection of old steam and diesel locomotives sitting in a fenced-off garden.

A beloved tribute to the Fab Four and the freedoms they inspired.