10-20 Athens Museums
Went to the National Archeological Museum and the Museum of Cycladic Art today.
The NAM has the Antikythera Mechanism which was a solar/lunar/whatever calculator and which features prominently in the latest Indiana Jones movie. I didn't notice any time portals open up while I was there.
Cycladic art comes from the Cyclades islands, of which Santorini is one. The figures are thought to relate to death because of the crossed arms and pointed toes.