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

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

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

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

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 ruins of this ancient fortification wall sit in the middle of a quiet, residential intersection.

One of the most photographed locations in the entire city.

Come for the giant taxidermy lion, stay for the knick knacks at this Minneapolis curiosity shop.

Opened in 1956, the first modern indoor shopping mall in the world was inspired by the shopping arcades found in European cities.

It's believed that this small church was connected to the Hagia Sophia via a secret tunnel.

Ancient serpentine sacrifice holder that has stood the test of time.

This column celebrates Rome's victory over the Goths, and may be the oldest Roman monument in Istanbul.

The most metal church of all time was built in record time because of an international, pious pissing contest.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

A fountain standing as a testament to a doomed alliance.

After the musical legend's death, his memorial was mysteriously graffitied in gold.

World's largest carved onyx figure stands as a tribute to enduring peace.

Dakota legend claims this locally iconic pinnacle was once part of a sacred burial site that was cleaved in two.

An amazing collection of sculptures and art.

This historic floating crane became an unlikely symbol of the port of Trieste.

Dedicated to the European Sinti and Roma peoples murdered during the Holocaust.

A historic fire call point.

This enormous censer uses a pulley system installed over 400 years ago.