The cutting edge of sleep technology
The research and development process is often a lengthy and arduous one. In the Cosmic Era, it is often just a matter of time and luck to see who breaks the next barrier in arcanotech.
Governments and mega-corporations have found a way to cheat the the system, the Dream Tanks are their most valuable assets.
One of the most common and well recognized SimSense parlors of the Cosmic Era
They say you give up a few things, chasing a dream. In those mists that's the literal truth, for every dream of yours that comes true, a piece of yourself, mind, body, or soul, gets taken by the mist. Worst part is, you won't even know what the cost of your dreams are until you go to leave, and by then you might not even have a mind left to change...
A fragment of the mists of creation, drawn to those desperate to make their dreams come true. Suitable for any magical fantasy setting.
Once one of their number, the eternal outcast wishes to take from the Elves what they hold dearest - their dreams, their past, their future.
Ages past the Woodking fell into a deep and terrible slumber, and from the fever of his dreams and nightmares the wooden dungeon of Limberlost grew.
A little way up the narrow valley, before they reach the woods, the PCs notice the squat, tumbledown buildings by the riverside. They are hardly big enough for a human to stand in, and the complex cogs and shafts that occupy the central cavity of one of the buildings are perplexing. What were these buildings? And how safe are they to explore?
Alternatively a desolate place is the perfect setting for a derelict chapel or croft. There needn't be any actual physical encounter involved, but it adds atmosphere to a place to see its dead history. For instance, in the Outer Hebrides there are whole deserted villages which were razed to the ground by the English during the Clearances. Such stories give a setting authenticity and character.