A museum in the childhood house of a medical pioneer.

Tucked away near more famous landmarks lies a statue meant to symbolize the confluence and continuing development of human culture.

Once the home of a hermetic monk, this cave now houses a small church.

The geographical center of Budapest is marked with a 10-foot-tall stylized zero.

A museum dedicated to a secret military hospital hidden beneath a castle in Budapest.

A series of caves under Castle Hill that once held the prisoner Vlad Tepes, better known as Count Dracula.

This statue of a falling man commemorates a teenage martyr of the Hungarian Revolution.

An unusual stone chair can be found on the banks of the River Wear, not far from Durham Cathedral.

The ruins of a once-grand castle that played host to a tournament with 100,000 attendees.

Now in ruins, this abbey was the home of Tironensian monks for more than 400 years.

The ruins of a small church belonging to a powerful Scottish family still hold the remains of its patriarch.

A square stone tomb marks the spot where six men were killed while holding a service in Caldoris Wood.

On a hill overlooking Loch Trool, a granite boulder marks the site where Robert the Bruce, King of Scotland, defeated an English army.

Now in ruins, this castle stood for centuries and saw a number of gruesome events.

The grave of a man who spent 23 days trapped underground after a mine collapse.

A circle made up of 19 boulders has stood in Scotland's Bladnoch Valley for some 4,000 years.

This fortified L-shaped tower is the ancient seat of clan Hannay.

A 2,000-year-old Iron Age fort offers stunning ocean views.

These stones date back to the 3rd or 2nd millennium B.C.

Legend says this cave housed a 16th-century cannibal and his family of 48.

These unique weather vanes honor Scotland's most famous bard and decorate this walkway.

A striking statue commemorates the men who worked underground in Kingshill and Allanton.

This bronze statue pays tribute to a Scottish professional boxer, who tragically died following a championship fight.

A mysterious ruin shrouded in more folklore than fact.