A Bronze age settlement on the Greek island of Santorini might have been the inspiration for Plato's Atlantis.

A 2,000-year-old computer demonstrates remarkable engineering and astronomical precision.

Hidden in a secluded Greek cove is a pristine beach marred only by the rusting smuggler's hulk stranded on its shores.

A spectacular cave and a beguiling lake.

Started as a kitchen garden, now the second largest botanical garden in the world.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

Luxury hotel turned into a refugee camp, then turned back into a luxury hotel.

A cylinder monument with a spectacular vista commemorates a friendship that some say never existed.

Take respite inside this jaw-dropping church while climbing the volcano where Georgia's Prometheus was once chained.

These Stalin-era industrial 'death traps' hang lifeless above the city

The charmingly disheveled clock tower of Tbilisi's puppet theater.

Underground monastery and fortress.

Where the lovelorn find a home for their sentimental keepsakes.

An ethereal glowing blue ocean cave in Croatia.

A tall karst islet popularized by 007.

Derelict airplane bodies serve as both home and income for three Thai families.

Six times a day a train runs right through the middle of this Thai street market, sending vendors scrambling.

A white Buddhist temple with a golden restroom.

Twice a day a speeding train passes only inches from the homes of this residential neighborhood.

Hundreds of wooden coffins dangle from cliffs and caves in the Philippines.

This wondrous waterfall rushing down a green-covered mountain wasn't discovered until 2010.

An eatery in a shallow river where diners can enjoy their meal mere feet from the base of an artificial waterfall.

A magically clear, blue river that seems to spring from nowhere.

This golden temple is surrounded by hundreds of stone tablets that comprise the "world's largest book."