What to do in Santorini
 

Going on a cruise with a group. Trip scheduled to see volcano though I'm not interested. Any suggestions for somewhere else to go? Is the wine tasting any good? Is snorkeling an option? Suggestions soon please. I leave next week!

My suggestion is to read the ports of call boards at cuisecritic.

When we had a cruise stop in Santorini, we did a self-guided walking tour I found in a guide book, but I'm sorry that I don't remember which book.

The following information is from the destinations section of this website.
"have a sunset drink on a terrace overlooking the caldera, one of the world's great sights; you'll find many view-providing watering holes in Fira, the capital, or Ia, Greece's most-photographed village. The next day, visit the extensive prehistoric site at Akrotiri and the Museum of Prehistoric Thera; then have a swim one of the black-sand beaches at Kamari or Perissa."

Wonderful. Sounds great. Many thanks!

I checked out cruise critic and was quite pleased. A new site for me and most definitely helpful. Thanks again!

Spent most of the time in line waiting for the cable car (from ship can take cable car, donkey or go by foot up same stairs) but still glad to have gone. If you are taking a cruise there, Oia (need to get transportation there from Santorini)is supposed to have amazing sunsets. See if you can get a cruise that leaves after that.