Baroque celebration of the end of the Great Plague of Vienna.

The Habsburgs' royal collections of art and wonders.

A Nesting Doll of Churches.

The yawning maw of this pagan visage is said to bite off the hands of liars.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

Ice cream stand, snack bar, and time capsule of milk conveyance.

The site of Paul Revere's historic two lantern warning.

Two thousand artifacts from around the world collected by one woman who loved to travel.

Ruins of a German castle on top of a towering stone pillar.

This TV tower once secretly housed a GDR intelligence team.

The castle where Martin Luther secretly translated the New Testament from Greek to German while in hiding.

The "feral child" who appeared in Bavaria in the 19th century remains as much a mystery as his unsolved murder.

Tiny memorials honor individual victims of the Holocaust.

Metro station with a claim to rock n' roll fame.

Sitting in the basement of a castle, the largest wine barrel in the world is bigger than most apartments.

Originally envisioned by King Ludwig II to rival Versailles, Herrenchiemsee's "New Palace" remains half-gilded for lack of funds.

Cold war icon and onetime "hole" in the iron curtain.

The last bastion of Roman presence north of the Alps looms over a German town.

The largest treasure hoard in Europe is contained in a castle that was bombed out during World War II.

This Dresden church was purposely rebuilt Protestant after being demolished in World War II.

Dress up like a miner and take a slide into the disco-lit depths of this once foundational salt mine.