Tarentola mauritanica — Moorish Gecko
Some other names for this species:
Moorish Wall Gecko, Common Wall Gecko
I saw three or four of these robust geckos early one morning walking around the small cruise ship port town of Katakolon. They were extremely wary; this was the closest shot I could get. These geckos are primarily nocturnal but they do bask in the sun when it's not too hot out.