For decades there was a funeral parlor down the street from my house. Right in the middle of a busy residential neighborhood in the city. There's only on-street parking and they had two spots in front of their building reserved for funerals. Only no one ever parked there. No cars, limos, hearses, anything. A neon open sign turned on every day over their door but no one ever came or went.
My parents had a tenant who was an elderly gentleman with few relatives. When he died, my mom called the parlor to arrange the funeral but no one answered. She left a message on their machine but no one ever called back. We weren't fully surprised because we'd been calling it a front for years, but mom was unconvinced until then.
The building got fully renovated a few years ago and we actually saw a funeral taking place, so they've upped their game.
Well, probably not what you're looking for but I used to work yard maintenance for a property management company.
I was sent to rake and tidy up the back yard of some house. In the back, there was an entrance to a root cellar that was separate from the house and had crappy wooden doors covering it. I was told to open it up and sweep the steps leading down to the cellar.
I don't have a problem with dark places, or bugs. But that was the first time I'd seen camel crickets. They were big, hump backed and striped. And there were dozens of them. I dutifully swept the steps, from the dead center of them, my eyes darting around constantly trying to gauge whether or not the weird ass bugs were about to launch themselves onto me. They didn't. They were super chill.
I told my dad about it later and he laughed at me for not knowing what the crickets were because they were so common. I've only seen a few more since then, and they still kinda weird me out.