Constructed on the ruins of a convent, this tower saved countless lives.

Abandoned bull fighting ring, slowly falling apart in Uruguay.

This singular art museum in São Paulo is unique inside and out.

A huge boat-shaped hotel with a blood red pool and other oddities.

A jungle in the heart of São Paulo reminds visitors of what Brazil looked like untouched by man.

One of São Paulo's tight urban intersections has become a haven for graffiti artists ever since a single Batman started the trend.

The crypts are so large they're basically their own underground church.

Buenos Aires' city of the dead contains some very famous remains, including Eva Perón.

This historic, palatial theater is now one of the world’s most beautiful bookstores.

A barbarous band of serpents guard the bases of these Aztec temples.

Diego Rivera's massive tiled fountain and failed infrastructure project.

The hot chocolate here all stems from small, sustainable microproducers in Chiapas and Tabasco.

Frida Kahlo's childhood home, now a museum of her life and works.

This historic Victorian hotel has a scandalous history of affairs and murder.

Ancient serpentine sacrifice holder that has stood the test of time.

A fountain standing as a testament to a doomed alliance.

Legend says if you stick your thumb in the hole and it gets wet, your wish will be granted.

A gorgeous, Gaudí-esque stairway constructed in the city of Istanbul by a prominent Jewish family.

A small etching on the white marble parapet was written in runic script by a Viking mercenary.

A meow-velous tribute to a beloved street cat, made famous on the internet.

A marvel of Byzantine engineering under the streets of Istanbul.

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

This equestrian statue of Constantine the Great has been the subject of criticism for centuries.

The Vatican's secret porn-festooned bathroom was painted in erotic murals by one of the greatest artists of the Renaissance.