Brussels' favorite peeing boy has a sister.

A little sculpture with a large wardrobe.

There was a top secret plan during World War II to seal a group of soldiers inside the rock.

This historic structure has been used as a mosque, a barracks, a prison, a school, and a bakery.

The ruined doorway is a portal to the building's turbulent and torturous past.

An ancient octagonal weather station named for the eight Greek gods of wind.

This ancient hydrological marvel is now the base of a modern outdoor cinema.

A Byzantine-era church hidden in a wooded area below the Acropolis.

The site where hundreds of Greeks were tortured by the Nazi secret police is now a cosmetics store.

A man's head is enshrined beneath a statue near the first building constructed for the modern Olympic Games.

This striking sculpture of Icarus honors Greece's fallen flyers.

This gem is often wrongly overshadowed by the larger, newer Metropolis church in Athens.

The only surviving choragic monument is a trophy awarded in 334 BC for the winning dramatic chorus.

Where commuters walk through remnants of an ancient Greek necropolis.

This small 16th-century church in Athens is almost entirely surrounded by a modern building.

The Cycladic architecture makes this Athens neighborhood feel like an island paradise hidden in the shadow of the Acropolis.

Legend says it was constructed with the destroyed pillar of an ancient Greek Temple.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

A tiny Greek Orthodox church from the Ottoman era hides on a busy city street.

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.

A relic of Victorian grandeur hides beneath a busy South London road.

A public display of random paleontology.

A symbol for the opposition to nuclear power around the world.

The final home of the legendary Danish sailor said to have lived to be 146 years old.