A brush maker used his factory to protect blind Jews from the Gestapo.

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

A prime example of socialist modernist architecture, wrapped in a enormous fresco about the media.

A socialist building dedicated to teachers showcases one of the largest Soviet mosaics in the world.

At one of Berlin’s oldest churches, visitors can place mosaic tiles to help restore a medieval mural.

Over time, this castle grew to encompass the entire island.

The Natural History Museum that time forgot.

Known as the Hintz House, this medieval pharmacy has been an apothecary's haven for nearly 450 years.

You would never guess that before World War II this lonely field was a bustling German city.

An impressive ensemble of sculptures that survived the Soviet regime.

An exhibit dedicated to a Lithuanian partisan.

Described as one of the Baltic region’s most daring and original construction projects.

A memorial to the murdered Jews of Kaunas.

Museum deep in the catacombs of St. Michael the Archangel Church is explored by touch, sound, and smell.

This massive underground salt mine now holds a sci-fi theme park in its depths.

This Transylvanian church has changed its denomination four times.

Some call this eerie forest of crooked trees the "Bermuda Triangle of Romania."

On the outskirts of a reborn ghost town, a decaying post office remembers the bad old days.

The largest Jewish museum in the southeastern U.S. houses a permanent Holocaust exhibit emphasizing the strength of its survivors.

Atlanta's strange assortment of concrete pillars inspires reflection in some, confusion in others.

The ruins of a paper mill destroyed during the Civil War still tower over a tributary of the Chattahoochee River.

A very tiny church, bisected by a now-dead oak tree and marooned in the middle of a shopping center parking lot.

This enormous World War II relic is one of the largest wooden structures in the world.