Cape Sounio Half Day Afternoon Tour Starting Price €43 By Keytours, Greece. A half day afternoon trip from Athens full of images. Begin your Sounio tour with a wonderful drive with €43 by Keytours. Inclusions per person: Entrance fees of the Temple of Poseidon. Transport by luxury bus. Pick up service. Professional and Lisensed guide. Highlights: Beautiful views of Saronic Gulf and its islands. Pass by some of the most expensive and highly rated areas of Athens. Vouliagmeni area. Passing by Hellinikon Olympic complex. Guided tour of Poseidon temple. T&C: This offer is valid from now until 31st March, 2016.