At high tide this strange footbridge appears to have no purpose whatsoever.

A beautiful Greco-Roman structure houses a well once believed to have healing powers.

The nearly 200-year-old folly has a secret spiral staircase hidden in one of its pillars.

One of four sister bronze sculptures dedicated to the widows and orphans of an 1881 tragedy.

This rare surviving broch is one of Scotland's most impressive Bronze Age structures.

An abandoned village where the ruined foundations cling to a cliff.

The sign marks one of the endpoints to mainland Britain's longest overland travel route.

The most northern place on the mainland of Great Britain.

A sea cave with a waterfall and Viking past

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

A site where “the ravages of the war are more striking…than any other place in contemporary Spain.”

This huge abandoned fortress hidden inside a mountain holds a world of subterranean secrets.

Giant topiary dog once played a role in a terrorist bomb plot.

Hundreds of stone stairs and a winding medieval bridge connect this haunting Spanish island to the mainland.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

A dramatic art installation features a BMW flying out of a building in Rotterdam.

The oldest statue in the Netherlands has survived relocation, bombardment, and burial.

These slanted cubic abodes are a creative if odd solution to a zoning pickle.

Journey through one of the oldest industrial sites in Scotland.

At 22 feet tall, these Bronze Age monoliths are some of the tallest standing stones in the United Kingdom.

England's largest white horse isn't even white.

Journey through this open museum where even employees remain true to period.

Home of the infamous Cauld Lad of Hylton and one of the inspirations behind "Alice" in Sunderland.