This stunning, out-of-the-way Croatian monument commemorates a community's uprising against occupying fascist forces.

An ethereal glowing blue ocean cave in Croatia.

The now-overgrown beach resort was once frequented by Yugoslav military elite.

An ancient knight and a symbol of the city's freedom.

A wunderkammer of gold and silver reliquaries and ancient saintly bones.

When Croatia became independent of Yugoslavia, the splintering governments left behind these concrete tunnels.

When a supermarket opened up shop within a medieval building it became protected by UNESCO on a technicality.

The big toe of this towering monument to a Croatian national hero is worn from years of superstitious rubbing.

This graffitied 19th-century building was a prototype of European industrial architecture.

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

An Oxford museum where visitors can have tea with the Mad Hatter and climb through the wardrobe to a fantasy land.

This castle was established by the 4th Duke of Montrose and is connected to the Buchanan Clan.

Accessible only at low tide, the deserted island is dotted with World War II ruins.

Hear the quietest sound from across the dome.

Near the former site of numerous witch burnings, this lavish Edinburgh mainstay pays homage to Scotland's brutal history.

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

A historic London pub with prison cells in the cellar and a "spy room" on the second floor.

The atmospheric road was never meant to be so creepy.

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

An unusual round church in London with a Templar past.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

The quaint little store that is said to have inspired a famous Dickens novel was only given its name after the book was released.

The world's largest collection of witchcraft regalia.

360° views of the city plus five floors of optical illusions and hands-on science.