Santorini is a volcanic caldera, not a single volcano. It's formed by a complex of several volcanic centers.

Here's the breakdown:

* Highest point: The highest point of Santorini is Mount Profitis Ilias, at 567 meters (1,860 feet) above sea level. However, this isn't the caldera's rim, but a separate peak on the island of Thera.

* Caldera rim: The rim of the Santorini caldera itself ranges in height, with the highest point around 360 meters (1,180 feet) above sea level.

* Active volcanoes: The active volcanoes within the caldera are Nea Kameni and Palea Kameni. Their heights are much lower:

* Nea Kameni: ~130 meters (430 feet) above sea level

* Palea Kameni: ~120 meters (390 feet) above sea level

So, there isn't a single "height" for Santorini's volcanoes. It depends on which part you are referring to.