Walk through Czech history in Prague's largest graveyard.

Two stunning 17th-century libraries and a cabinet of curiosities.

On this stunning Scottish island, you can walk in the footsteps of dinosaurs.

Now famous as the "Harry Potter bridge," this impressive concrete viaduct has long been an icon in its own right.

An ancient Scottish rock formation said to be the gravesite of a giant remains ensconced in legend and intrigue.

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.

These fantastically named natural pools look like something out of a Scottish myth.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

Singapore's landscaping project is home to 18 incredible Supertrees.

Abandoned railway line circling the city of Paris.

France's most famous cemetery, with some of its most curious tombs.

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

It's a mystery why these remains were found with no traces of their bodies in sight.

This beautiful Victorian ironwork masterpiece was built to keep London from smelling like poop.

Hidden beneath the streets of London is a secret subway that only carried mail.

The only gulag ever to exist in socialist Yugoslavia.

This functional solar system model was inspired by the famous Eisinga Planetarium.

This towering church is home to a world-famous organ and a treasure trove of medieval art.

Built by crowdsourcing, this wooden foot bridge saved a part of Rotterdam that was languishing in wait of city funding.

This still-celebrated home was a radical architectural experiment in 3D De Stijl.

This museum inside Amsterdam's largest cemetery explores how people deal with death.

This narrow Ghent alleyway is an officially sanctioned street art tunnel.

A piece of the front end of a British cruiser that was used as a block ship in World War I.

Six turbines towering over a wide road for passersby.