This medieval sanctuary's tree-framed door looks like a portal to a mythical realm.

This historic covered bridge contains a series of macabre paintings that communicate one thing: everyone dies.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

An icy lake tucked among jaw-dropping alpine panoramas.

On this wooded path, a stained-glass window creates a spellbinding forest cathedral.

A colorful piece of contemporary art cheerfully clashes with Lyon's historical architecture.

A tiled, multi-level garden of survival in Lyon.

One of the oldest libraries in England, and one of the last of the great medieval chained collections.

Seat of the Duke and Duchess of Devonshire for centuries.

6000-year-old site covered in more than 50 megaliths.

Prehistoric sandstone menhir with Early Bronze Age cup and ring markings, also known as Robin Hood's Stone.

19th century tunnels burrowed under Liverpool.