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.
It seemed like a great place to camp. The clearing was good sized and sheltered from the wind. The brook just a few feet away. There is a natural hallow to keep the horses.
Then the night came.
It was like it became a different place. The temperature dropped. The wind, which does not seem to disturb cloth, almost cuts through you like an arctic wind. No one can sleep, as the soft ground has turned hard. The horses are uneasy. The Bats are flying over and stopping in the trees.
And then there is the eyes. There are glowing eyes just inside the tree line watching your group. The mages and clerics can detect nothing, but there is still something there.
(yet there is nothing at all... The Darkness will do nothing unless the players do something to it. And even then it will all seem to be a conincidence.)
Of course, in the morning, it all becomes sweet and light.