A subterranean prison complex, meant to incarcerate those who need to be removed from society.
You are sailing along the sea when you see a lighthouse in the deep blue middle. It is a lone light house, built on a rock not much larger than the tower itself. It is an oddity.
Cheza Betaze is the 17th Nekron urban area found in the Northern Cascades. The reasons why it is the best known of all Nekron cavern cities is that is has an easily accessible surface entrance/ exit which is just off the main Cascade trade trails. Being of recent construction in a time of prosperity, it is a city the Nekron feel proud off.
In the middle of an unimportant combat with some bandits a burst of wild magic transforms all of the PCs and their opponents in to random animals and monsters. They retain their intelligence (though not, of course, the ability of speech). They can either carry on the combat in their new forms, panic, or otherwise react how they see best. After about an hour, they return, unharmed, to their normal form.