A Roman monument to their own civil engineering prowess.

Romania's triumphal arch looks out over Bucharest.

This communist behemoth is the heaviest building in the world and a legacy of a brutal regime.

A giant portrait of an ancient king looms over the river.

A plaque bearing the names of those who dedicated themselves to protecting Budapest's Jewish population during World War II.

A triumphant marble and bronze fountain depicting a 15th-century Hungarian king and his hunting party.

According to this bar, God gave an “11th commandment” to Antwerp: Thou shalt drink beer.

If drivers cross the rumble strip on this stretch of Route 66 at just the right speed it plays "America the Beautiful."

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

This sparsely populated town offers a look back in time.

The oldest continuously occupied public building in the United States.

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

A Trabant car, a kangaroo statue, and a plethora of plants take over this abandoned-factory-turned-bar.

The metal leaves on this tree are engraved with the names of Holocaust victims.

Bizarrely shaped rock formations in northwest Bulgaria come with equally bizarre legends.

This 14th century castle withstood years of battle but is now sliding off the hills into the Danube.

A misnamed well, with a deep dark past.

Once the home of a hermetic monk, this cave now houses a small church.

Go surfing on this urban wave, "hacked" by local surfers.

The prototype for all Nazi concentration camps.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

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

Practice your Dirty Dancing lifts in the manmade lake where Johnny Castle himself did.