Beneath Denmark's Højbro bridge, a bronze merman and his seven sons forever mourn for the mother and wife who left them for land.

Denmark’s ultra-modern library hides a treasury of rare, unique books.

An "evil painter" included pointed symbols in this artwork to poke fun at members of the Danish Parliament.

This pair of gilded girls atop an Art Deco building in Copenhagen were built to function as a weather indicator.

This ruined travelers shelter sits abandoned in a desolate bog of Flow Country.

A sea cave with a waterfall and Viking past

The ruins of a defunct limestone quarry still haunt this Scottish promontory.

From Ancient Rome to WWII, Neupfarrplatz has over 2,000 years of history underneath its main square.

Home to the most complete dodo remains known - one head, and one foot.

Ancient Egyptian wigs, South American feather headdresses, a bounty of anthropological artifacts in Oxford.

Used as an example in one of the first dictionary entries for "museum" in 1706.

One of Oxford's greatest treasures likely belonged to England's legendary King Alfred the Great.

The spot where Oxford garnered its name was also home to a medieval philosopher and includes a house covered in statues.

Once one of the largest rooms full of books in the world, this bookstore basement is still a treat for bibliophiles.

One of Europe's oldest libraries.

A historic scientific breakthrough that crosses nine borders.

First point in the Struve Geodetic Arc, a 19th century undertaking to measure the Earth's size and shape.

Rubbing the buttons along this statue's coat is considered good luck.

This medieval Estonian tower provides access to a series of tunnels that have been home to soldiers, punks, and fine art.

The Guardian of Tallinn.

The oldest continuously operating pharmacy in Europe.

A monument commemorating the 852 lives lost in the sinking of the MS Estonia.

During the Soviet era, the spire of this longstanding church was used as a radio transmission tower.

Disused seaplane hangar gets a second life as the jaw-dropping home of Estonia's museum of maritime history.