The Emperor Tiberius' palace of debauchery.

This ominous Albanian fortress houses tanks and downed planes as a reminder of their victories over Western imperialism.

A naturally beautiful, seemingly bottomless deep blue spring.

An Albanian monument to the Communism that nearly crushed the country is now a crumbling wreck.

A curious cave church carved into the face of a cliff.

A curious little museum dedicated to the furry feline in the cat haven that is Old Town Kotor.

A tiny church on a man-made island in the Adriatic.

The now-overgrown beach resort was once frequented by Yugoslav military elite.

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

Among the ostentatious rococo ornamentation of this church, an image of death cuts the life-thread.

Four-story slides send people whizzing through the math department at this Munich university.

The prototype for all Nazi concentration camps.

This famed marionette theater and museum is bursting with imaginative string puppets.

From Ancient Rome to WWII, Neupfarrplatz has over 2,000 years of history underneath its main square.

The most visited pilgrimage site in Armenia once held a saint in a pit for 13 years.

Nestled in a peaceful valley, this Armenian monastery may have been saved from Mongols thanks to the eyes of God.

Called the "Armenian Stonehenge," this ring of menhirs pierced with holes may be a prehistoric astronomical observatory.

Centuries before the modern seismograph, Armenian monks measured quakes with this tilting pillar.

Giant stone letters dedicated to the founder of Armenia's alphabet.

Abandoned railway line circling the city of Paris.