The extravagance of Portugal’s "Pink Palace" resulted in a noble title being awarded to its owner.

Perhaps the most spectacular grotto along the Algarve coastline.

This unassuming chapel in Portugal plays host to a ghoulish collection of bones.

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

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

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.”

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

Hungarian Jews were ghettoized during the Second World War, but little remains of the original wall that closed the Jewish people off from the rest of the city.

The holes in this wall provide a glimpse into Jewish life in Budapest, both past and present.

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

This Budapest bar allows drinkers to leave their mark on the walls, floor, and even ceiling.

Breathtaking and huge 430 year old maps of Italy.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

The ruins of the largest gladiatorial school in Rome are largely hidden under modern streets.

This ancient Roman prison is decorated with an upside-down cross not as blasphemy but as saintly tribute.

The location of the world's first telescope demonstration.

A true Valhalla for cactus and succulent lovers.

A dramatic art installation features a BMW flying out of a building in Rotterdam.

These lights mark the area of Rotterdam that was bombed and burned in 1940.

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

Rotterdammers' dirty minds gave this Santa a dirty nickname and cursed it to a life of wandering.

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

Time stands still at this serene burial ground in the center of Budapest.