This Fifth Avenue church has long been the favored worshiping place of Broadway actors and vaudeville performers.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

Hidden in Central Park's Ramble is a troublesome cave buried just beneath the surface.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

A spiralling hourglass-shaped tower rises from the forests in Denmark.

Hindu temple of the dead home to hundreds of long-tailed macaques.

The biggest and deepest Cold War bunker open to the public can be found in southeast England.

A 26-foot shark sculpture—a statement about bombs—set off a municipal battle royale.

The Bristol Camera Obscura housed in an ancient windmill.

Grotto replete with mystical designs laid out in glued shell mosaics.

Huge winged monument in the United Kingdom.

Famously misunderstood wonder of the ancient world

A miniature village mimics the surrounding buildings so well it includes itself.

Human-made caves excavated to hide a secret society of wealthy pagans.

These stark white cliffs were spat up by the sea and are slowly being retaken by it.

The "Heroine of Dunkirk" rescued over 7,000 Allied troops during the historic World War II evacuation.

This foreboding medieval castle was twice besieged by barons rebelling against the English king.

The spot where three Protestant clergymen were burned at the stake during the reign of "Bloody Mary."

This open-air heritage museum illuminates centuries of historic English life from a West Sussex village.

This centuries-old hotel hides a network of secret cellars and passages once used by smugglers.

This mysterious chalk figure of a horse has been recreated and restored for more than a century.

These seaside shelters once enjoyed by royalty remain a part of local history.

From battleships to Roman vessels, this museum explores the depths of shipwrecks in the region.

Decrepit Victorian public lift is a white-knuckle ride.