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

A house of bones — but nobody is quite sure to whom they belong.

This German bone house contains the remains of some 20,000 souls.

A church filled with the bones of hundreds of virgins martyrs—or so they say.

In 1830, cemetery workers in Cham unearthed a chamber housing thousands of skeletal remains from the 13th century, which can still be viewed today.

This landmark church concealed a crypt packed with bones that was discovered thanks to the London Blitz.

A 1,000-year-old church holds the bones of the Christian martyrs who died hiding inside it.

In a small churchyard in Dingolfing, Germany the quaint Schusterkapelle is there to remind you of your imminent mortality.

An Austrian house of bones filled with hundreds of intricately painted skulls.

A church of bones, decorated with 40,000 human skeletons.

An Australian lake whose pink hue defies scientific explanation.

South Korea's love of the silly photograph is on full display at this goofy collection of trompe l'oeil paintings.

On the Oregon coast there is a natural hole that seems to be draining the sea.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

Staves, storm-calling, and of course, necropants.

A swing to dangle you off the very edge.

A solitary tree has grown up all alone on Lake Wānaka, backdropped by the beautiful Southern Alps.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

The knock-off oil painting capital of the world.

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

The oldest hotel in the world has been operated by the same family for over 1,300 years, even catering to samurai.

The latest in a series of long glass bridges suspended at terrifying heights.

One man's swirling six-acre monument of stone.

The thousands of shades on display — some toxic, others impossibly rare — are a library of more than just color.