A centuries old castle atop a dormant volcano houses museums devoted to both women and witches.

Trick water gardens from 1619 featuring a 200 piece mechanical theater powered by water.

This handsomely carved wooden church is more than 800 years old.

"World machine" built by an untrained Austrian farmer.

This "mathematical tower" was an observatory, early skyscraper, and place to reflect on all of nature and the cosmos.

Is this a portal to another side of the cosmos?

The personal charnel house of Anton Bruckner.

Artfully arranged bones of 5,800 Austrians.

A monument marks the site where the famed composer stopped to relieve himself on a long journey. Just one problem: Mozart never went to Raschala.

One of the best-preserved wooden manor houses in Latvia, decorated with painted interior walls.

This pair of unsuspecting buildings are in fact the very first modern skyscrapers in Europe.

It's rumored this unique Baltic beacon was designed by Gustave Eiffel himself.

An ornate private entrance to the Vienna subway built specifically for the emperor.

A patriotic medieval knight in driven-nail armor raised money for widows and orphans of WWI.

From amidst her whirling waves, this mermaid sees all who pass through St. Swithun’s Church. If local legends are to be believed, she serves as a warning.

It's believed King John of England stayed at this 13th-century castle before riding off to sign the Magna Carta.

A rare survivor from the age of plagues.

This monumental gateway marks the northern edge of Brighton and is a welcome sign to all visitors to the seaside city.

Overlooking the spot where the Pilgrims boarded the Mayflower stands Devon's answer to the Colossus of Rhodes.

An allegorical statue of a giant pregnant woman representing justice and truth.

This ancient bridge made of stone slabs is said to be reserved for the devil to sunbathe.

Part museum, part piece of Arthurian-inspired history, this stately hall attracts King Arthur fans from miles away.

A unique waterfall that some believe attracts the fairfolk.

A fantastic castle rumored to be the birthplace of King Arthur.