This 45-story tall abandoned skyscraper is the third tallest building in New Orleans and Lousiana.

In the middle of a busy airport, a statue honoring the astronaut who told Houston that Apollo 13 had a problem.

Take a dip in the world's largest mineral hot springs pool.

Meant to be a lavish presidential home, the palace became a symbol of the fall of South Vietnam.

Witnesses claim the Virgin Mary statue outside the church once mysteriously shed a single tear.

This French colonial post office is arguably the grandest in all of Southeast Asia.

A large AIDS Memorial Pathway art installation provides a moment for quiet contemplation in this public park.

On the edge of this small Washington Park, a piece of the Earth's mantle has come to the surface.

A goddess-topped water fountain in Chicago was created thanks to the dreams of a thirsty newsboy.

This music school doubles as a store for unique, hand-crafted, and hard-to-find instruments.

This Cold War siren is one off the last of its kind still standing with its immensely powerful original horn.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

A celebration of one of the West End’s most recognizable figures, who made helping others his life's work.

Three young men who lived on this street are honored for their service during World War I.

America's silhouette includes 100 square miles of wilderness jutting into Canada thanks to an old mapmaking error.

This iconic water tower and failed bandstand is open for panoramic views once a year.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

The stones of this Incan wall complex fit together so well you couldn't fit a piece of paper between some of them.

An Inca spa, military outpost or maybe… both?

This ancient structure is widely thought to be the oldest intact pyramid in the world.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

Go take a picture with the inventor of the daguerreotype photographic process.

The house where John Wilkes Booth conspired with his co-conspirators.