The finest excursion in Santorini are the watercraft and also wine trips. Every tour I've handled Santorini has actually been excellent (or really excellent)-- as well as I've never had a disappointment. It's not definitely essential to pre-book scenic tours before arriving but if you're on a short visit (less than 5 days) it's probably a great idea to book your tour ahead of time. From June to September the very best scenic tours could be fully scheduled weeks ahead of time.

Santorini Tours and Things To Do