A neolithic tomb converted into a tiny chapel.

"Portugal's Stonehenge" is made up of nut-like stones aligned with the heavens.

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

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

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

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

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

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

A striking public sculpture representing the period of martial law in Communist Poland.

Brought to you by the makers of fiberglass dinosaurs.

Relive a Polish uprising via an enormous, century-old cyclorama.

These massive moving sand dunes have swallowed an entire village and are still on the run.

Museum dedicated to "the man who moved the Earth."

The silly symbol for an underground protest group is now scattered around the city.

A huge wooden clock that is so beautiful its creator was forcibly blinded.

Boats must transform into railroad cars to navigate this Polish canal.

Crosses of all shapes, sizes and colors litter the mountain, the site of a huge yearly Orthodox pilgrimage.

After the famous composer died in Paris, his sister snuck his heart out of the country to honor his wish that it be buried in their native country.

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

Naturally formed rock city in Poland.

This uber-quaint Polish village is known for its habit of painting elaborate floral motifs on just about everything.

This Nazi ruin was the site where Hitler was almost blown up by a suitcase bomb.

Beneath Kraków Old Town's main square lies a hologram-filled medieval market vampire graveyard wonderland.