This mine was once used to defend the coast from attack during World War II.

A tiny, heartwarming piece of art hiding in plain sight.

The construction of this bridge dates back to the 15th century.

The small bright red pillar survived the 1996 Manchester bombing virtually unscathed.

An abandoned canal route lies hidden under the streets of Manchester.

The city of Manchester quietly unveiled this tribute to a 19th-century massacre.

Manchester salvaged this sculpture of the adopted Mancunian when it was no longer wanted in Ukraine.

Climb to the top of its spiral spire for spectacular views of Copenhagen.

A little-known castle set in a nature reserve.

This haunting sculpture was created as a statement on the mechanized warfare of the First World War.

It's a mystery why these remains were found with no traces of their bodies in sight.

The gigantic skull of a long-extinct species that once roamed the forests of England and Ireland.

These wire animal sculptures commemorate the exotic inhabitants that once called the Tower of London home.

A measuring mishap led to these artificial stone ladies losing their stomachs.

A tiny replica of the iconic London landmark hides on the side of the steel structure.

A closed London rail station created to cart away the dead still bears the marks of attempts to make it less morbid.

This museum explores how a 1973 volcanic eruption forever changed this small Icelandic island.

Originally meant to hold a statue of King William IV, this support sat empty for years. Today, it hosts a rotating cast of public artwork.

One part local history, 99 parts gruesome haunted house.

Stonehenge has nothing on Castlerigg’s views.

Inside this McDonald's you can dine on your Big Mac and fries next to a 2,500-year-old Roman wall.

Once the last route taken by condemned prisoners.

The real clothing store that inspired a fictional spy organization's front.

This incredible viaduct was part of the Victorian railway boom and helped the Midland Railway navigate tough terrain.