A clock designed to run with perfect accuracy for 10,000 years.

The world's second-largest sundial, made entirely out of stone.

A scenic fort on the harbor protected Philadelphia from an attack that never came.

What began as an art installation is now the private drinkhaüs for a brewery's employees.

Museum houses an impressive display of the origin and artistry from the now-quaint invention's history.

A large instrument played by the wind.

An extraordinary library and archive dedicated to the history of the Arctic and Antarctic poles.

A mechanized clock where a man fights off a dragon, crab, and rooster.

A complicated contraption for telling time by the moon.

Go inside to really appreciate this 500-year-old technological masterpiece.

Numberless clock creates a meal of time for the dreaded, insectile Chronophage.

19th-century operating theatre in which the use of ether was first demonstrated - plus, a skeleton and a mummy!

Opulent downtown movie theater now houses cars as an indoor parking garage.

An indoor miniature village and labor of love for Laurence Geiringer, a model railroad enthusiast.

A failed piece of Orientalism has become the proud symbol of a community.

This massive solar system model is sprawled out across Maine's suburban wilderness.

A musical instrument played by the sea.

A whimsical bridge adorned with decorative dragons.

This scale model of our solar system hid in plain sight for years before a physics team sought out all the planets.

Stay overnight in the world's most sleekly designed rabbit hole, free of charge.

On top of a resort town as old as the Bronze Age sits an incredible war memorial statue overlooking the beaches below.

A open air theatre built on a cliff by an eccentric British woman.

A island reachable by a causeway at low tide is possibly one of the earliest Western European locations to be identified in text.

These historic defenses ensured the city within would survive hundreds of years of occupations, sieges, and invasions.