Immortal combat in a Moscow museum.

The library's graceful rotunda is like a bibliophile's temple.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

This picturesque horseshoe weir was first built in the 1600s to prevent flooding in the town of Bath.

The largest library in Latin America owes its existence to an Old World earthquake and a Napoleonic invasion.

Hidden in plain sight, this creepy sculpture watches from above.

A 26-foot shark sculpture—a statement about bombs—set off a municipal battle royale.

One of Europe's oldest libraries.

Oxford University's stateliest library seems designed to make students truly feel the weight of knowledge.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

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

This one has sailed five times as far as Sir Francis Drake's famous ship.

The skyline of Montreal includes the silhouette of an unexpected fruit-shaped Canadian staple.

A floating cat sanctuary on an Amsterdam canal.

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

This crumbling industrial fortress has attracted daredevils, filmmakers, and historians.

A labyrinth hides in plain sight at each of the city's 270 Tube stations.

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

This centuries-old pub boasts a collection of more than 4,500 snippets of neckties from around the world.

The stoic structure boasts a whimsical set of stained glass art commemorating Lewis Carroll.

This tree was grafted from the actual tree that led Isaac Newton to ponder the theory of gravity.

The block of aged dairy is probably still edible after 2,300 years in a peat bog.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

A counter-culture bookstore like no other hides in plain sight in the streets of Paris.