The "dragon babies" of southeastern Europe.

A miniature train-ride through Slovenia's largest cave system.

This Slovakian statue of an emerging sewer worker might just be a bronze peeping tom.

Destroyed Serbian army headquarters sits half crumbled in a largely revitalized Belgrade.

Moscow's imposing monument to the Space Age.

The oldest museum in Russia is home to a fascinating collection of nearly two million anthropological artifacts and anatomical curiosities.

The gorgeous entrances into the city's underbelly look more like grand halls than subway stops.

This Transylvanian church has changed its denomination four times.

A medieval church built up to defend its village.

The possible imprisonment of Vlad the Impaler here earned the medieval castle its nickname, "Dracula's Castle."

A small town Romanian cemetery filled with darkly humorous gravestones.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

An ancient and majestic fortress that played an integral role in Portugal's road to independence.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

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

Brought to you by the makers of fiberglass dinosaurs.

A statue honors the children who fought Nazis in Poland.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

An underground city of salt.

One of the most breathtaking railways in Europe also takes one of the steepest climbs, from fjord to mountain plateau.

An intricately carved Viking church overlooks a glistening fjord.

These slanted cubic abodes are a creative if odd solution to a zoning pickle.

This Netherlands museum holds a gloriously mechanical collection of ornate musical automata.