✕By 18:00 the main viewing paths are shoulder-to-shoulder. You end up watching the sun behind someone's phone screen. Instead, watch from Imerovigli or the Akrotiri lighthouse where the views are equally stunning without the circus.
✕The main car parks fill up by mid-morning and drivers circle endlessly. Use the KTEL bus from Fira or park at the far end of town and walk. The narrow streets are not designed for rental cars.
✕Most caldera boat tours are large, crowded vessels with a buffet lunch and two brief swimming stops. If you want a real sailing experience, book a small private catamaran from Ammoudi or Vlychada. The difference in quality is enormous.
✕Hotels charge 2-3x more for rooms with caldera views. But many 'caldera view' rooms only see a sliver of the caldera from a balcony. Check actual photos, not promotional shots. Some non-caldera hotels in Pyrgos or Megalochori are more charming.
✕Akrotiri archaeological site is one of the most important in the Aegean and the Red Beach nearby is visually dramatic. Yet many visitors spend all their time in Oia and Fira, missing the southern coast entirely.
💡 What nobody tells you: The best way to experience Santorini's caldera is not from the clifftop but from the water. Rent a kayak in Akrotiri and paddle along the volcanic coastline at dawn before any boats are out — you'll see the caldera the way it looked 3,600 years ago.