Intricate metal sculpture that's half gothic cathedral, half construction equipment.

A small window on Via Piella offers a lovely and rare peek at Bologna's lost canals.

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

A series of caves under Castle Hill that once held the prisoner Vlad Tepes, better known as Count Dracula.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

A museum in the childhood house of a medical pioneer.

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

Tucked away near more famous landmarks lies a statue meant to symbolize the confluence and continuing development of human culture.

On Gellért Hill, this statue depicts the tragic tale of lovers divided by the Danube.

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

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

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

A cluster of granite granaries perched on stilts.

These narrow stone granaries have been used to store and dry out grain for hundreds of years.

Local lore says the devil built this beautiful medieval bridge to help a fleeing bandit.

A fortress off the West coast of Portugal that dates back to 1502.

One Portuguese poet described this cape, the westernmost point in mainland Europe, as "where the land ends and the sea begins."

A unique seaside cave where Aleister Crowley faked his own death.

In addition to showing films, this one-screen arthouse cinema from the late 1940s is a museum of old film equipment.

Portugal's National Pantheon has a history of curses, collapses and financial problems.

This unique architectural wonder is also tied to one of the 20th-century's most renowned writers.

One of the smallest bookstores on the planet.

Located in the thermoelectric factory that once powered the entire city, this Portuguese museum is shockingly fascinating.

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