Get hands on with the technological marvels of the Classical world.

The partially submerged ruins of a white marble quarry used in ancient Greece for over 1,200 years.

The ruins of an ancient mansion sits in front of and underneath a contemporary art gallery.

There are many Byzantine-era churches still standing in Athens, but this is the only one with a 2,500-year-old column rising through its roof.

What once sat in the world’s spotlight is today a largely disused ghost complex.

This medieval "painted village" is famous for its geometric facades.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

Record-holding coffin moonlights as an eatery run by undertakers.

This underground transport hub doubles as an art gallery.

A quirky collection flush with information on commode culture from ancient times to modern day.

A reconstructed medieval gateway that was the magnificent entrance to the capital city dating back to 1037.

This unassuming museum's slogan translates to “there is a limit of sadness, anxiety has no limits."