Curate, connect, and discover
I have the urge to add on, but don't know what to write-
Humans like to interpret the afterlife as some unreachable place, or some distant time. But they also like to describe the transition between living and dead as passing through gates, passages, doors, veils. And that rather implies the afterlife is simply the next room over, not some whole other house.
The thing about ghosts is, everyone eventually dies. Everyone. And most everyone stays dead. They leave one room - the room of the living - and never enter it again. But ghosts will knock on the walls, tap on windows, play their music far too loudly at two am, thump and bump and generally annoy the living into acknowledging their continued existence.
They wander the halls and yards of existence without going back into the living room, and never quite let you forget they were still there.
As a half ghost, that was especially true of Danny. And his Lair reflected it.
While the interiors of Lairs were generally contained to the Ghost Zone, they existed at the points where one reality intersected the other. Their walls were the walls between living and dead.
Danny, being both living and dead, had a Lair more liminal than most. It sauntered down side streets, and peeked into other people's houses; it made itself comfortable on the couches of neighbours, and invaded public parks. Most of FentonWorks was his Lair, but so were certain halls of his school, a booth at the Nastyburger, and the sky over Amity Park.
And when Danny moved out, left Amity and started university in Gotham, his Lair went with him.
Let me say it again - this metaphysical space of liminality, that claimed a city's whole sky, several building interiors, and nearly entire neighbourhoods - moved to Gotham.
This was a bit of problem for the local vigilantes.
There were new streets. New parks. New rooftops with accompanying buildings that could only be accessed from above. There was a mystery booth at the Batburger nearest Gotham U that only seemed to exist on certain days of the week, with a menu to a place that didn't exist and music that hadn't seen airtime since the 90's.
You could see the stars from Crime Alley, even on cloudy nights.
Granted, Danny couldn't exactly control where his Lair manifested physically.
It hovered around his apartment in Park Row, putting his childhood bedroom up the hall from his new, adult bedroom. It added halls to GU, then claimed new ones as Danny progressed through his degree. It collapsed dead end alleyways into small town green spaces, and made sure at least some of the exits lead back to Gotham.
The vigilantes particularly disliked that little feature. For all that Danny's Lair was adding features to Gotham, it wasn't removing them from Amity Park. So when you entered a "new" building from a rooftop in Gotham, the street level exit left you hundreds of miles away in a city in an entirely different State.
The average citizen adapted, of course. It was nice to take your lunch break in a peaceful (if a bit spooky) park that cancelled out all the city noise of downtown Gotham, and still be able to get back to work on time. And Gotham U was already such a maze, a few non-euclidean hallways that cut across campus was seen as a godsend. So what if they looked like they came from a movie about high school in the 80's?
It only really became a problem for Danny when his Lair opened itself a door between his kitchen, and a mansion he'd never even visited before.
Because now Batman was in his apartment, and Danny had no way to explain that he hadn't intentionally started haunting Wayne Manor.