The "Prussian Versailles" that is as glorious today as when it was built.

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

A striking 12th-century-style castle built on the edge of a cliff.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

A small but immensely extravagant palace built by the "Night King."

The most visited, and possibly most controversial, museum in Germany.

The fairy tale castle of the “fairy-tale king,” this was also the inspiration for Disney’s “Sleeping Beauty.”

The medieval "dragon" on an Austrian city's coat-of-arms comes to life in a fountain.

This splendid tomb may look fantastic, but there's nothing in it...

An exquisite Baroque church in Vienna's old town.

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

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.

The Habsburgs' royal collections of art and wonders.

Op-art architecture designed for happiness.

Built to give thanks for the passing of a plague epidemic, this cathedral is a one-of-a-kind architectural hybrid.

The final resting place for the remains of 143 Habsburg royalty.

A once-thriving hotel in the Swiss Alps couldn't compete with climate change.

This historic covered bridge contains a series of macabre paintings that communicate one thing: everyone dies.

Portugal’s highest lighthouse has one of the most impressive focal planes in the world.

The "Little Ones," show Portugal in full miniature splendor.

Pagan monument converted to Christianity with the population.

Elaborate tile work in this railway station tells the story of Portugal.

"Portugal's Stonehenge" is made up of nut-like stones aligned with the heavens.