I am organizing my 13th or 14th international tour. If you are interested in coming along, please email me at firstname.lastname@example.org. The dates are July 22nd to August 5th, 2018 with the trip starting in Athens and ending in Santorini. Teachers get CEU credit at no charge. Graduate credit available for a fee. A lesson plan is provided for you at the end of the tour so you can do a presentation for faculty or students. Since this is a private tour, you need to talk to me first so I can alert the travel company.
Here is the trip website: https://www.geeo.org/tours/GreeceHowe/