The oldest subscription library in Britain was started by lead miners in southwest Scotland.

Thought to be the oldest Norman crypt in the world.

The second largest palm grove in Europe was planted during Moorish times and has been largely unchanged since then.

This former burial ground, built atop discarded ballast from cargo ships, is now a public park.

This sculpture made up of 22 bulbous bronze figures reminds locals of massive Weeble Woobles.

This Scottish tollhouse was a destination for clandestine marriages in the 18th and 19th centuries.

A pile of earth left over from a water supply project was converted into an anti-aircraft installation during World War II.

Legend says that Wade the Giant scooped up a handful of earth to throw at his wife, leaving behind this round valley.

An art gallery dedicated to art works by coal miners which depict work in the mines and life in the former British mining communities.

Eat fish and chips in a striking Neoclassical building that once hid a public lavatory.

Inside a former smuggler's cave, an artificial waterfall and light show.

This grandiose staircase was part of the revival of a medieval Spanish architectural style combining Christian and Islamic influences.

Europe's largest river aquarium features freshwater species from around the world.

The geomorphology of the Turia Valley could easily be mistaken for Utah or Arizona.

Once a spa resort, then a tuberculosis sanatorium, and now a crumbling ruin.

The engineer of the Imperial Canal of Aragon installed this fountain to show skeptics he had achieved his aim.

A private collector gathered these sound machines and musical instruments across five continents.

From motorcycles to firetrucks and sports cars to horse-drawn carriages, this Belgian collection goes beyond rare cars.

These structures hanging over the water's surface are traditional fishing machines.

A bridge to rival those in nearby Venice but without the crowds.

This historic Art Nouveau townhouse was the former home of the son of a famous chemical inventor and industrialist.

This former drainage pumping station was fundamental to the drainage of the Po delta.

Depending on how it is measured, this lighthouse can claim to be the tallest in Europe and the tallest conventional lighthouse in the world.

This impressive mural is just one amazing artwork on the walls of a data center in Padua.