A town's history displayed through a massive work of art.

An abandoned, desolate train tunnel that was used during World War II.

This huge concrete map of Scotland was built as a thank you gift from a Polish soldier.

The phrase "the shot heard around the world" was coined after a skirmish at this bridge.

This tidal island, a sacred site in early English Christianity, was the target of a notable Viking invasion.

A simple but powerful tribute to the 20 victims of the 1692 witch trials.

An authentic, seaworthy replica of the ship that sailed to Newfoundland in 1497.

After protestors toppled a statue of a 17th-century slave trader, the pedestal where it once stood remains unoccupied.

The oldest standing concrete bridge in England was also constructed as a work of art.

A disastrous D-Day rehearsal was relatively unknown until this sunken tank was discovered 40 years later.

This monument to one of the largest science fiction games of all time bears the names of hundreds of thousands of players.

A relatively obscure antihero from the Marvel Comics universe adorns a wall inside Iceland's main airport.

A monument dedicated to the civil uprisings that took place during the Pots and Pans Revolution.

The ruins of Scottish sea salt production.

A nuclear bunker built to shelter the politicians and important people of Scotland in case of nuclear attack.

Bronze plates placed around this Scottish fishing village form a true-scale model of the solar system.

Stay in the one time home to one of Scotland's most notorious gentleman's sex clubs.

Cascading waterfalls mark the gateway to the ancient burial place of Clan Macnab.

This unassuming alcove in London’s famous Tower Bridge once served to capture, store, and display dead bodies from the River Thames.

The last vessel built by a submarine pioneer stands as a monument to his legacy.

A quiet memorial marks the spot where the victims of the Salem Witch Trials were executed.

A 16th-century artillery fort built to protect England against European invasion.

A medieval quay that was the Mayflower's final port of call before sailing for America.

A remarkable feat of Victorian engineering across the Firth of Forth.