The remains of Uruguayan hero José Artigas lie beneath a monument in Montevideo’s main square.

This beautiful example of neoclassical architecture is one of Uruguay's most treasured cultural gems.

The design of the Palacio Salvo has been described as "a lighthouse on top of a building."

Where sweethearts leave their love locks in the Uruguayan capital.

This elaborate tunnel is the first structure composed of cast concrete in the United States.

A tree that grows parallel to the ground was declared Brooklyn's "crowning curio" by the poet who saved it.

This city park was once a lookout point for George Washington’s army during the Battle of Brooklyn in 1776.

This secluded ruin was once a home for exotic plants.

This striking arch, one of the first architectural elements constructed in Prospect Park, was recently restored to its original glory.

Michael Jackson got Bad and Crocodile Dundee walked on heads in this iconic Brooklyn subway station.

Tucked in a nondescript downtown Brooklyn mall is a bar containing a remarkable turn of the century anatomical wax collection last seen in 1920s Berlin.

This beautiful Brooklyn monument over a crypt memorializes a grim and largely unknown story from the American Revolution.

Once a ferry dock, radio transmitter, and now a new Greenpoint park.

A drawbridge named for a potentially intersex Polish national who fought alongside George Washington during the American Revolution, and an example of "Pulaski Red".

A little lighthouse in New York City, surrounded by mysterious stories of insanity-driven construction.

An art installation commemorates journalist Nellie Bly's undercover reporting inside a New York asylum.

A former insane asylum despised by Nelly Bly and Charles Dickens is now fashionable apartments.

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

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

A crumbling hospital from the 1850s on Roosevelt Island.

Walk into the 19th century without leaving Brooklyn.

A decommissioned military complex that's now a modern industrial park.

A touching tribute to the "Queen of Soul."

Once home to the country's most gargantuan ships, this graving dock now waits for people to buy furniture.