This church devoted to Mexico's "dead saint" is a festive celebration of a formerly hidden religious figure.

The splendor of this 17th century golden chapel has led it to be called the "eighth wonder of the world."

An indigenous take on European design creates a stunning visual overload.

Two waterfalls flow down the cliff faces decorated with rare natural basalt columns.

A uniquely robust and historic look at Mexico's omnipresent dance with Death.

An Aztec temple, the largest man-made pyramid in the world, sits buried in earth with a Spanish church set on top.

Underwater art project will double as a massive artificial coral reef to help regenerate the damaged ecosystem.

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

An island filled with hundreds of hanging, decomposing, decapitated dolls.

These azure waters were thought to lead to the Mayan Underworld.

Extraordinary sculpture garden created by an eccentric English poet.

The walls and ceiling of this Polish church are decorated with thousands of skulls, with another 21,000 skeletons just below.

Two monstrous faces loom over a village in Czechia.

Underneath this small church are 15,000 bones, arranged by an obsessive academic.

An old asylum graveyard that's been abandoned for half a century attracts those seeking a dark thrill.

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

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

Macabre astrological automaton clock dating to the late 1400s.

This artificial cave looks like something out of a fairytale.

Walk through Czech history in Prague's largest graveyard.

A museum of alchemy and a basement laboratory all housed in an ancient building in a Gothic tower.

No one knows who created the statues or if they are arranged properly—let alone the artwork's real name.

In Twickenham sits a small whitewashed castle that inspired Mary Shelley's 'Frankenstein.'

Gothic tower where Lord Alfred Tennyson wrote the poem "The Sleeping Beauty."