Hundreds of lucky felines haunt the ruins where Caesar was murdered.

This 6th-century church has the largest and best-preserved collection of Byzantine mosaics outside Constantinople.

An incredible mosaic-lined monument said to have held the remains of an ancient Roman empress.

The roof of this ancient mausoleum is made from a single Istrian stone weighing a massive 230 tons.

This uniquely designed bridge served as the city gate for Comacchio.

One of the greatest collections of coins in the world is housed in the former mansion of an archeological pioneer.

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

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

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

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

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

This mystical orb covered in strange symbols is thought to have been used in ancient Greek magical rituals.

Where commuters walk through remnants of an ancient Greek necropolis.

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

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

The ruins of an abandoned medieval city where the last Byzantine emperor was crowned.

This legendary city has been a tourist attraction for centuries.

This 15th-century island fortress later served as home to the executioners no one wanted to live near.

This 18th-century former mosque held the first Hellenic Parliament.

The castle where Martin Luther secretly translated the New Testament from Greek to German while in hiding.

This historic stone bridge has an entire neighborhood clinging to its sides.

The world's most important buildings shrunk to a tiny size.

A British general, a suggestive tree, a map of paradise.

This Slovakian statue of an emerging sewer worker might just be a bronze peeping tom.