In ancient times it was one of the Seven Wonders of the Ancient World, but today the Temple of Artemis is represented by a single column standing in a swamp.

Discovered in a vision by a bedridden German nun in 1812, this stone building is believed by many Catholics and Muslims to be where the Virgin Mary lived her last years. There is also a healing fountain.

The Church of the Holy Cross on Akdamar Island is a ruined Armenian cathedral dating from 921 AD. Beautifully situated on Lake Van, the church is famed for its fascinating medieval sculptures.

This Roman market town was an early center of Christianity and one of the Seven Churches of Revelation. In the 4th century, Apollinaris of Laodicea taught the heresy of Apollinarianism.

This 11th-century church (later a mosque and now a museum) contains one of the finest preserved galleries of Byzantine mosaics anywhere.

Cappadocia's most famous attraction, for good reason, is the Göreme Open Air Museum, a complex of medieval cave churches carved out and painted by Orthodox monks.

This ancient cave church is believed to have been dug by St. Peter himself. Fronted by a Crusader-era facade, it still hosts worship services and attracts pilgrims.

The "New Mosque" is not so new - it was built in the 1600s. Designed by Da'ud Aga, a pupil of Sinan, Yeni Camii has become a defining feature of Istanbul's skyline.