It is one of the most popular ingredients in the cuisine of the Cyclades, with the energy of Santorini's soil giving it an even higher quality. Caper is a wild bush springing up to dry walls and grows in rocky places on the island.
Specifically, Santorini is famous for being one of the few places in the world where capers are preserved by drying. During the summer months you may see these tiny beans drying on roofs beside the grapes which are due to become raisins.
Nowadays, capers are used in the traditional Santorinian salad (a key ingredient), in fava beans and dozens of other local recipes. You can buy capers and caper leaves in various shops selling local products.