One of the most popular ways to get around on Santorini is by scooter. You can rent them almost everywhere, and it gives you lots of freedom. You can stop anywhere on the side of the road to enjoy one of the many gorgeous views that Santorini has to offer. It is also an ideal way of transportation if you want to visit Red Beach.
Red Beach is a unique beach: it really looks red because of the red colored lava stones/sand and red lava rocks surrounding the beach. You have to make an effort to go to this beach though: you will have to climb over some rocks and go down a pretty steep path in order to get there. But ... it is well worth it, I promise.