Fabulous guide! A 5th generation native of Santoríni that knows the entire history of the island, every inch of the island, and most of the natives. We saw many sights that other tours don't know about (black sand and red sand beaches, special viewpoints, etc.). We also taught Loakim about geocaching and he found one at a special viewpoint. Especially use him as a guide if you like geocaching. He spoke excellent English and had a very comfortable Mercedes van for transportation.