Walk over a 150 year old manhole.

This Manhattan museum houses one of the largest collections of Spanish art and manuscripts outside of Spain.

These unique stepping stones hug a river's edge to take hikers on a journey through a limestone gorge.

A 168-foot tower, part of the abandoned Chester Leadworks facility.

A seaside town with no sea in sight.

The whimsical twist of this spire was either caused by the Devil, an unexpected virgin, or lead.

Seat of the Duke and Duchess of Devonshire for centuries.

The patches of trees pay tribute to Queen Elizabeth II.

A face-like natural rock formation so well known, a pub was named in its honor.

This iconic Peak District ridge was once one of the busiest roads in medieval Britain.

A Victorian Gothic masterpiece housing a world-class collection of rare books and manuscripts.

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

This nondescript building hides an entrance to an underground nuclear tunnel system.

The remnants of a depressing public toilet are now a hub of ever evolving street art.

A magnificent winding road through a steep valley, with deep natural caverns at the bottom

A hunk of prehistoric lava rests amid the Gothic architecture of a campus quad.

19th century museum with an eclectic mix of curiosities, from Egyptian artifacts to items on archery history to the skull of the world's oldest horse.

Semi-precious Blue John stones have been mined in this cavern system for centuries.

This chain of artificial lakes was an ideal test ground for the aircraft that would carry the "bouncing bombs" used by the WWII "Dambusters" squad.

The heroic tale of a remarkable pup who refused to leave her master's side, no matter what.