Where a guard killed nine German prisoners during one of the worst 20th-century POW camp massacres in U.S. history.

Oddly enough, a pair of Wolfs funded the construction of this Little Red Riding Hood sculpture.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

This mansion was made famous by its colorful cast of owners and location along the Sante Fe Trail.

A remarkably opulent mansion with a tragic history.

Castle and secret tunnel withstood a siege until its owner was killed by the Holy Roman Empire, while sitting on the toilet.

The southernmost outpost of the Russian Empire in colonial America.

The elegant manor house where Kaiser Wilhelm II lived in exile after World War I.

Step back in time at this 1950s display home, built to showcase once cutting-edge electric amenities.

This museum houses an imposing skeleton army comprised of creatures great and small.

A museum which takes visitors to the côté obscure of Paris.

Enter the cabin of a life-sized Hindenburg replica.

A small square plaque marks a failed assassination attempt that could have changed history.

These bronze pamphlets remember a remarkable group of Germans who fearlessly opposed the Nazis in the very center of their power.

The prototype for all Nazi concentration camps.

This Rococo church is known as the most beautiful village church in the world, and does not disappoint.

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

The fairy tale castle of the "fairy-tale king."