A stunning 18th-century site where pilgrims ascend by a series of punishing stairs only to return via funicular.

A replica of the Roman emperor in glorious full color.

This crumbling medieval basilica once attracted pilgrims by the thousands to collect a miraculous dust that formed above the saint's tomb.

This beautiful train graveyard is one of the largest collections of steam locomotives in the Mediterranean and Europe.

A charming beach town in Turkey captures all the colors of the rainbow.

A tiny park in the middle of some big power politics.

Ancient serpentine sacrifice holder that has stood the test of time.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

A fountain standing as a testament to a doomed alliance.

This crucial gathering spot along the "hippie trail" still displays old notes between traveling beatniks and backpackers.

A marvel of Byzantine engineering under the streets of Istanbul.

Legend says if you stick your thumb in the hole and it gets wet, your wish will be granted.

Climb a steep hill in 90 seconds on the second-oldest urban subway in the world.

Taking the subway here means doing so over a bridge located in the middle of an estuary.

A literally moving statue of stacked metal giants just continually trying (and failing) to find love.

Tower with a double-helix spiral, adorned with letters of the Georgian alphabet.

A Turkish monastery tucked into a cliff wall.

This abandoned gun tower was built to defend the River Thames from a French naval attack.

No one is sure what to do with this WWII shipwreck that sits at the bottom of the Thames, still loaded with tons of explosives.

Surreal riveted sea forts once protected the Kent shores from German attack.

Overlooking the seaside town of Margate stands a tribute to an artist's lover.

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

A beautiful Kentish country intersection hosts a tasty little photo spot.

This curious Tudor-era castle was once home to Napoleon's greatest adversary, the Duke of Wellington.