Shrapnel scars and bullet holes from the Spanish Civil War can still be seen in this monument to Spanish doctor Federico Rubio.

Inaugurated three times, this tower offers some of the best views of Madrid.

This phone booth was recreated to honor "La cabina," considered the best horror film in the history of Spanish television.

Dedicated to a young woman who broke gender barriers at the University of Madrid.

A window into a long-lost world, these colorful tiles advertise a long-defunct range of purgative teas, harmless smokables, and diarrhea cures.

An 18th-century religious argument etched into stone.

This remarkable sculpture symbolizes the regeneration in this Glasgow suburb.

The Guinness Record holder as the "tallest cinema in the world" is a building with screens in almost every one of its 12 floors

The longest timber-piled jetty in the world has an underwater observatory.

A tribute to a child prodigy who died way too young.

A cottage built at the birthplace of Alexander Selkirk, a sailor who inspired the novel 'Robinson Crusoe.'

This magical trail takes visitors on a journey round miniature wooden houses on the picturesque Denmark River.

Hundreds of caves once used to store grains and animal feed.

Nature puts on a spectacular show at this blowhole on the eastern side of Gran Canaria.

This coffee shop lies hidden beneath a historic church.

Inside a Scottish castle hangs the tattered remains of a flag with murky origins and supposed magic powers.

The remnants of a facade from a 19th-century market stall emporium.

A secret garden in a picturesque Edinburgh village has inspired artists for centuries.

A controversial cenotaph dedicated to a local physician with an unscrupulous past.

Mining, a local filmmaker, and a philanthropist doctor all commemorated within a small space in suburban Edinburgh

The abandoned buildings of a hospital that saw most of its activity during the World Wars.

Sculptures depicting Scottish and English soldiers in battle honor a 16th-century conflict.

This former school is now abandoned and a canvas for graffiti artists.

A small stone pillar marks the spot where Mary, Queen of Scots, spent her final hours as a free woman.