Soloi-Pompeipolis is just one of the landmarks located 7 mi (11.3 km) from central Mezitli, so you might want to stop by for a few pics during your trip.
If museums are on your list, you might want to check out the upcoming exhibitions at Archaeology & Ethnography Museum in Yenişehir. If you want to see more of the museums in Mersin, Ataturk House Museum isn't far either.