A rocky face gazes out over an enormous volcanic crater.

Portugal’s highest lighthouse has one of the most impressive focal planes in the world.

Several petroglyphs are all that remain of an ancient pyramid.

A marvel of technology a century ago, this disused power station now offers a lovely glimpse into the industrial design of the past.

Possibly the world's largest hourglass only needs to be reset every New Year's Eve.

Sitting beneath an unremarkable residential building is a museum devoted to classic Pinball.

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

A Hungarian pharmacy museum with a box full of mummy powder.

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