The Mexican painter Diego Rivera created this unusual museum to display his collection of pre-Hispanic artifacts.

This ancient structure was built by a mysterious civilization that was largely destroyed by a volcanic eruption.

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

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

The burial place of some of Mexico's most prominent residents is full of macabre stories and hidden masonic symbols.

This incredible college library is a visual masterpiece of mosaic art. It also looks kind of like a giant boombox.

A museum in the former home of Marxist revolutionary Leon Trotsky.

Gilded heaven for philatelists and architecture freaks, still in full working order despite sitting atop tremulous ground.

The famous artist couple lived and worked here, in two different houses connected by a bridge.

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

Explore the atmospheric ruins of an abandoned convent in the dense forests of Mexico's first national park.

This strange sculpture of a menacing skull surrounded by sun rays was discovered at the foot of the Pyramid of the Sun.

These biodiverse university gardens form a green oasis amid the urban chaos of Mexico City.

Commonly acknowledged as the only public monument to the Devil himself.

A stone slab in Madrid marks the point from which the distances of Spain's national roads are measured.

A rare set of strings by famed instrument maker Antonio Stradivarius is on display in the Royal Palace.

This bronze boar's snout has been rubbed to a golden sheen by visitors seeking good fortune.

An airy Art Deco space devoted to the weird and wonderful folk art traditions of Mexico.

One of the largest Buddhist stupas in the world keeps an eye out in every direction.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

Mexico's astounding mummy museum with "the world's smallest mummy."

An ancient capital city that dates back 3,000 years and harbors many surprises.

At a museum of everyday objects, it is the act of collecting that is really on display.

The only castle in North America to ever house European sovereigns.