A sculptural commentary on capitalism pokes up from the East River.

This curved Manhattan building was built to house the opulence of John D. Rockefeller's oil empire.

This industrial area was the dumping ground for massive amounts of trash, some of which washes up as tiny bits of sea glass.

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

Salute the leader of the proletariat.

The site of the deadly Triangle Shirtwaist Factory Fire.

This historic train station has been converted to a locomotive themed hotel.

The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).

A downtown park built on top of unclaimed graves.

The final resting place of soldiers' loyal canine companions.

You can still ride this 100-year-old work of art in Brooklyn's largest public park.

The remains of a community that was forced to move for a dam that never materialized still rot in this Pennsylvania park.

A working steam clock, one of only a few in the world, located in Vancouver's Victorian Gastown.

A 2,000-year-old computer demonstrates remarkable engineering and astronomical precision.

Formerly known as National D-Day Museum, this collection commemorates the battles of Normandy and WWII.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

A mocking tribute to the past and modern leadership of Prague.

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.

The highest point in Washington state is a volcano covered in glaciers.

Hidden beneath the famous St. Peter's Basilica is a veritable city of the dead that may hold the remains of St. Peter himself.

A WWI fighter plane and turn-of-the-century penny candy shop are among the unexpected features of this Financial District building.

This replica of the Greek structure is in the heart of Nashville.

Gaze upon chocolate sculptures depicting everything from chariot races to Gaudí's famous church at this shrine to sweets.

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