"The Tholos (Ancient Rome) at the sanctuary of Athena Pronoia is a circular building that was constructed between 380 and 360 BC. It consisted of 20 Doric columns arranged with an exterior diameter of 14.76 meters, with 10 Corinthian columns in the interior." (Ref Wiki)
"The Tholos is located approximately a half a mile (800 m) from the main ruins at Delphi. Three of the Doric columns have been restored, making it the most popular site at Delphi for tourists to take photographs." (Ref Wiki)
"It is a round structure, usually built upon a couple of steps (a podium), with a ring of columns supporting a domed roof. It has been suggested that the tholos, well provided with water and drains, was where fish were sold, although other uses for the central tholos have been suggested, such as the place where official weights and measures were held for reference or as shrines to the gods of the market place." (Ref Wiki)
Variation of the first photo "Greece - Delphi - Tholos - 01"
Merge of two photos, the first is the Tholos itself, as shown of the photo (Greece - Delphi - Tholos - 01), the second is the same subject/area but from a different angle that shows more the surrounding mountains compares to the first one.
Both photos were processed in Photomatix (HDR), then merge ad processed in Photoshop.