A small pack of an ancient, hairless breed of dog once believed to guide souls through the underworld lives on its grounds.

These strikingly colorful paintings were created by a mysterious Mesoamerican civilization.

A 500-year-old series of tunnels long believed to be folkloric was uncovered beneath the streets of Puebla.

A disquieting Aztec sculpture displays hundreds of stone skulls representing the victims of human sacrifice.

This foreboding building was the headquarters of the terrifying Spanish Inquisition in Mexico.

This macabre masterpiece of a mural is one of Francisco Goya's "Black Paintings."

These enigmatic columns tower over the ruins of an ancient Toltec city.

This somber statue remembers the enslaved women who were forced to nurse their owners' babies.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

Bloodstains can still be seen in this medieval church where two medics saved lives on D-Day.

An effigy of a trapped paratrooper dangles from a Normandy church to commemorate one remarkable D-Day event.

A labyrinthine museum chronicling the history of African culture in Brazil.

A curious memento mori hangs in the magnificent Cathedral of Segovia.

These spectacular, symbolic serpents lie within the shadow of the Great Temple.

A scientific repository of goiters, boils and other ailments throughout Mexican history.

The "world's smallest volcano" has been used to store meals and dispose of dead bodies.

The winter home of millions of migrating monarch butterflies.

An elaborate Mayan city shrouded in alien conspiracy revealed the tomb of Pacal the Great.

The remnants of an archaeological camp stand within Tikal National Park.

A church dedicated to the Mexican skeleton saint.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

An archaeological museum at the Aztec pyramid displays signs of the New Fire ritual performed every 52 years.

The remains of an Aztec school and various intriguing artifacts lie below a modern cultural center.

This neo-Gothic monastery offers a rare chance to witness the unique maned wolf right up close.