When King Oswald was killed in battle, an eagle dropped his arm here creating a new spring.

This ancient abbey now lies in majestic ruin behind a caravan park.

These precariously placed ruins harken back to a 13th-century castle.

A sweet symbol marks the place where torturous executions were once carried out.

This 17th-century street hidden beneath Edinburgh was once a breeding ground for the black death.

Climb to the top of its spiral spire for spectacular views of Copenhagen.

A dead saint, a deadly poison, and a mysterious holy ooze.

Geometry and mystery come together in an epic show of octagonal masonry.

Three underground crypts and a pointed arch under the bell tower make this cathedral unique among Romanesque churches.

This 6th-century church honors St. Tudno, the patron saint of Llandudno.

A small island abbey is the final resting place of many medieval Scottish monarchs, including the real Macbeth.

This former guildhall with a bacon-like exterior is now home to a museum covering 600 years of Antwerp's musical history.

Spanish architects used seized Muslim gravestones to rebuild parts of the fortress.

In Florence's great Duomo, a 26 foot fresco honors a mercenary famous for attacking Florence.

These quaint French houses dangle precariously over a precipice.

This Welsh hotel is the spiritual home of the British 1953 Everest expedition, the first successful ascent of Mount Everest.

A relic of the old jail still stands in its original location.

The ruins of a medieval castle that once belonged to one of the most powerful families in the Netherlands.

This Scottish castle has witnessed clan rivalries, Jacobite uprisings, whisky smuggling, and more.

A cave in southern Italy adorned with thousand-year-old Biblical frescoes existed in obscurity until fairly recently.

This public toilet built in the famous Amsterdam School architectural style is a Dutch national monument.

Natural history museum displaying a famous taxidermied St. Bernard.

The bears of Bern have been a city highlight for over 500 years.

A 6th-century stone lies at the site of the mythical battle waged between King Arthur and his nemesis Mordred.