A magnificent collection of imperial armor and weaponry.

The solemn exterior conceals an opulent interior of this 17th century church.

A neo-Gothic church built to thank God for saving the Emperor of Austria from an assassination.

An exquisite Baroque church in Vienna's old town.

The townhouse where the "Blood Countess" Elizabeth Báthory started her murderous career.

A spherical "micro-nation" in the heart of Vienna.

A tropical paradise just a short trip from the opera house is filled with beautiful winged creatures.

The Polish capital has had a deep connection to its guardian mermaid for almost a millennium now.

This enormous "cloth of the conquest" depicts the Norman invasion of England in mind-blowing detail.

A monument to the three wars that led to German unification towers within a Berlin traffic circle.

The birthplace of the ferocious William the Conqueror, this castle is awash in medieval history.

This crumbling medieval basilica once attracted pilgrims by the thousands to collect a miraculous dust that formed above the saint's tomb.

The fierce beast perches atop a pedestal marking where the historic City of London gates once stood.

The mysterious megaliths have enchanted and intrigued visitors for thousands of years.

A rare chance to ride one of the few continuous elevators still in operation.

A near tragic event on this bridge helped inspire the classic film "It's a Wonderful Life."

A castle built for love, and abandoned due to heartbreak.

Small ship votives hang from the vaulted ceiling of this port-side church with a Latin inscription on the wall.

A small etching on the white marble parapet was written in runic script by a Viking mercenary.

Now abandoned, the first public health hospital in the U.S. saw more than one million immigrants from around the world.

This palatial spiral staircase was so unusual the name "snail" was given to the noble family who built it.

The tomb was guarded by soldiers from both sides of the war, and some left their initials carved in the brick.

More stones than Stonehenge, all scattered within a windswept landscape sure to enchant 'Outlander' fans.

The world's only flying boat museum honors a small Irish village that sent 20th-century aviation to new heights.