In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

An artsy hidden staircase leads to breathtaking views of San Francisco.

Politicians, bureaucrats, and military officers gathered in this field near the Capitol to settle their disputes with blood.

The world's oldest continuously operating airport was founded by the Wright Brothers.

Two dozen pinball games hidden away inside a most unlikely location.

"A hideous albatross in the Hudson River Valley."

The oldest continuously inhabited street in America.

This stone gatehouse was once the entrance to a historic mountain resort, and it had a cameo in a cheesy cult horror movie.

Although he donated over 3,000 acres to Los Angles, Griffith's life was marred by controversy.

A colorful square marks the heart of the city's LGBTQ community.

Mai Tais and Navy Grog served up in one of the original tiki bars.

Scattered around Atlanta are little doors with big charm.

A vision of beautiful Hindu architecture in the middle of the American South.

Abandoned bull fighting ring, slowly falling apart in Uruguay.

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."

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

A Christian monastery stands on what was once a holy Incan temple.

A highland eco-park celebrates more than a thousand varieties of tuber.

Built on the remains of one the Incas’ most important gathering spots, this square keeps the spirit of a fallen empire alive.

This geometric feat is a testament to the Incas' mesmerizing architectural abilities.

Situated on a sacred Inca site, this 16th-century cathedral took nearly 100 years to build.

A monument to the conquistador became increasingly controversial in the very city that he founded.