Go to Zotos patisserie in Fira and taste the most incredible chocolate cake in the oldest Santorinian pastry shop.
Go the the Old Port of Fira, take the caique (kaiki) around the Caldera and discover the stunning cave houses and dive in the mystic waters to discover the lost Atlantis.
Go to the small undiscovered picturesque village of Karderado which is just 2 Km South of Fira, and visit the bakery of Kalimeris to taste the best kritharokouloura of Santorini.
Go to Ammoudi beach, the small port below Thira, and dive from the 6 meters high of the small church of Ai Nikolas that you will find if you follow the small path after the tavernas of the port.
Even if everyone states that the best Caldera View is in Oia, climb up to Firostefani, hanging 300m above Fira and discover the most spectacular sunset view of Santorini.