A medieval church with largest and oldest collection of Renaissance frescoes in France.

A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

Exquisite wall sculptures carved in secret by an early quarryman in an obscure corner of the Paris Catacombs.

Site of a classic 19th-century physics experiment to prove the earth is rotating.

After immigrating to Paris in the 1970s, two brothers from Laos built a grocery store empire.

This nondescript building was the birthplace of Morris cars.

The fantastic charm of England's oldest botanical garden has made it a place of writerly inspiration for centuries.

One of Europe's oldest libraries.

A theatre built to house the rowdy Oxford graduation ceremonies became the stage for a debate about God's existence.

Once one of the largest rooms full of books in the world, this bookstore basement is still a treat for bibliophiles.

An extraordinary collection of scientific instruments - and Einstein's chalkboard - inside the world's oldest purpose built museum building.

The spot where three Protestant clergymen were burned at the stake during the reign of "Bloody Mary."

This Norman castle was once the site of a Victorian-era prison, and now exists as a luxury hotel.

This otherwise ordinary close on the Royal Mile constituted the end of the world for Edinburgh’s poorest residents.

This single room has survived the centuries with almost no deterioration.

Ireland's most remarkable collection of these curious cone-shaped houses is worth the buzz.

The oldest inn in Kilkenny was established by the first convicted witch in Ireland.

Be(w)ar(e) the moat around this historic Czech castle.

Trick water gardens from 1619 featuring a 200 piece mechanical theater powered by water.

A small marionette collection located within the dark cellars of an 11th-century Austrian castle.

Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.

A little sculpture with a large wardrobe.

Belgium’s famous peeing statue has worn many hats (and coats, and pants), which are on display at this small museum.