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

Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

An ancient Greek monument and a Byzantine church coexist inside this cave.

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

Legend says this sacred tree was a gift from goddess Athena.

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

This black sand beach was crafted from volcanic explosions including the historic Minoan eruption.

Inside the Wayne County airport is an amazing collection of lights and sounds.

A sculpture made of 10 Cadillacs as a monument to the “Golden Age” of the American automobile.

A time-capsule monument reminding future generations of the importance of efficient and effective use of natural resources.

A neo-Gothic church built to thank God for saving the Emperor of Austria from an assassination.

A railway bridge leading nowhere stands lonely in the middle of a meadow.

The body of at least one victim of a construction accident was left behind in the collapsed pylon, buried under tons of concrete.

Beneath the impressive baroque cathedral that rises from the center of Berlin lies the largest collection of Prussian royals in the world.

This ancient Chinese observatory still contains early astronomy technology.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

Sweden's oldest animated sign is still lighting up the skyline today.

It is said that each of the white stones in the red facade of this medieval house represents the head of a murdered Swedish noble.

A golden plaque marks the site of the mysterious unsolved assassination of the former Swedish prime minister.

A man has revenged his true love's betrayal through tears and stone genitalia.

Stockholm's narrowest alley is barely over two feet wide.

Stockholm's tiniest statue is of a small boy looking at the Moon.

An ancient Viking runestone hidden in plain view in Stockholm's old town.

When this 18th-century observatory's meridian was moved, it set Sweden's time back by 0.04 seconds.