The outside of this theater is decorated with a Diego Rivera mural that explores the history of Mexico.

Mexico's second-tallest monument, now half-hidden in a private residential complex.

The entrance to an early 20th-century cultural center features murals that deal with the cultural fusion that characterizes Mexico.

It's believed this golden brick is part of the legendary lost Aztec treasure.

A fabulously bizarre surrealist sculpture by the late artist Leonora Carrington.

A jewel of the Mexico city skyline now slowly crumbles after surviving an earthquake.

This ancient jade mask depicting the Zapotec bat god was found in the ruins of the pyramids of Monte Alban.

This colossal ancient sculpture of the monstrous Aztec rain god has a literally stormy history.

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

Visiting this cacophonous collection of vintage novelties is like stepping into the mind of a crazed toymaker.

The final resting place of soldiers' loyal canine companions.

Hidden beneath the streets of London is a secret subway that only carried mail.

A Museum of Psychiatry in a still-operating mental institution.

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

This former Masonic lodge has been transformed into part museum, part bar, all awesome.

A museum celebrating the Canadian forces that liberated Belgium from the Nazis replete with battlefield miniatures and multiple Gardens.

From Tintin to the Smurfs, Europe's greatest graphic icons are celebrated in a grand Art Noveau gallery.

When you're a great Russian Tsar, even your vomit gets a statue.

This collection of over 50 murals celebrates Brussels' rich history as the self-proclaimed home of the "comic strip."

This artificial cave looks like something out of a fairytale.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

Microscopic scenes; some call it novelty, some call it art.

Countless grotesque faces stare out from this eerie Prague art wall.

This Prague museum collects brutalist relics and memories from the country's former Soviet rule.