Oldest Museum of the Netherlands is a true cabinet of curiosities.

Amsterdam's former hotspot for public executions and dissections.

Inside the cloister of the Temple of San Juan Bautista is a ceiling decorated with gold Baroque illustrations.

This piece of a Renaissance-era Spanish castle remained lost for decades.

History is on display in this hall, which has served as the seat of city government for centuries.

A shining treasure trove of fine Mexican silver dating back to the 15th century.

These subterranean models show Mexico City's central square during three different eras.

A Mexico City subway station boasts a hidden museum, complete with a working radio booth.

Its most enigmatic sculpture is a giantess with a ghostly face on her knee.

Hidden for more than a century, the grave of the Conquistador remains forgotten behind these church walls.

The unique collection of gifts includes braids of human hair, a spoon, and a Virgin made of bread.

This French cemetery houses some of the most exquisite examples of funerary art in Mexico City.

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

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

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

Twelve natural mummies are displayed in the crypt of this former monastery school.

Superstitious? Discover the witchy side of Mexico through its largest esoteric market.

An unassuming churchyard is the resting place of a pioneering surveyor and reluctant namesake of a mountain.

One man's attempt to stay one step ahead of the church.

An eccentric Victorian aristocrat's enormous collection of medieval armor and weapons from around the world.

A museum that chronicles the interesting and often dark history of the London docklands, once one of the major trading ports of the world.

This museum is dedicated solely to this millennia-old handheld cooling device.

The famous polar explorer stands outside the Royal Geographical Society's headquarters.

This unassuming alcove in London’s famous Tower Bridge once served to capture, store, and display dead bodies from the River Thames.