A faithful reproduction of Al-Jazari's enormous water clock.

Running since 1864, this clock has yet to be wound, one of the longest-running science experiments known.

"Singing sands" and the world's largest hourglass reside near Japan's Kotogahama beach.

This lovely little bridge hidden in a Switzerland gorge is essentially a fairytale.

These magnificent 240-year-old machines are considered distant ancestors of the computer.

An amazing clockwork museum in the Val de Travers holds examples of various prestigious legacies horological history.

One of the world's most complex timepieces.

A sacred well steeped in Pagan roots on the West Coast of Ireland.

This singular Irish dolmen is more Frank Lloyd Wright than upright stonehenge.

A beautiful and classically designed villa, with an hourly infestation of monsters.

The ancient tomb acts as a calendar that keeps perfect time.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

A historic 1890s architectural masterpiece with an iconic clock tower that, once open to the public, now faces an uncertain future.

The clock that sets them all.

The most confusing clock in New York.

"World machine" built by an untrained Austrian farmer.

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

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

A vast city of the dead, where the deceased outnumber the living by more than a million.

A large instrument played by the wind.

Mysterious painted skulls in Moravia.

Europe's second largest ossuary wasn't discovered until 2001.