An abandoned Byzantine fortress and notorious prison.

A little-known park with unusual, half-ruined structures and a mystical energy.

An artistic melting pot inside an old roadside inn from the Ottoman era.

One of the most photographed locations in the entire city.

A two thousand year old brothel uncovered in Northern Greece.

Believed to be the only Orthodox church in the world that features a free-standing pulpit.

This painting of a beloved dog will be on display at the Scottish National Gallery at long as the museum exists.

Perched above a grotto, this tribute to Mother Nature looks out into the ocean.

A legend says that if this elaborately decorated glass breaks, the good fortune of its owner's household will also disappear.

Dedicated to the god Dionysus, this theatre was used for both musical and theatrical performances.

Monasteries on rock pillars, once accessible only by frayed ropes.

Thousands of rusting train cars have been slowly falling apart on the edge of Greece's second largest city.

This open air archeological site houses almost as much wildlife as it does classical religious artifacts.

400 million years of erosion shaped these fascinating seaside caves, which made an appearance on 'Game of Thrones.'

This historic timepiece was a popular meeting place for romantic rendezvous in the 1960s.

A stunning medieval castle owned and restored by the famed actor Jeremy Irons.

This inn of the court provides a fascinating window into London’s legal and architectural history.

The main residence of the Erskine family and the hereditary keeper of the nearby royal Stirling Castle.

This pyramid is dedicated to all those who suffered martyrdom for civil and religious liberty in Scotland.

There are two dozen tanks just sitting in an open field in Lower Saxony.

A decomissioned facility where the German "Transrapid" maglev trains were once tested.

A spitting ode to a German serial killer.

Eight naturally mummified bodies in glass coffins are housed in an underground crypt.

The only microgravity tower in Europe can produce nine seconds of weightlessness.