Temple of Artemis from Above

View looking down, and south-southwest, at the meager remains of one of the Seven Wonders of the Ancient World—the Temple of Artemis at Ephesus.

The column left of the center is where the temple building stood and just to the right of the center are the stones of the foundation of a structure near where the altar of Artemis was located.

Wikipedia has a long article on the Temple of Artemis.