When I was 15 I found a 5 pack of beer on the side of the road. I guess someone didn’t like the one that was missing. I shared with my friend that bought some ice.
Reminds me of the time I found the lower leg of a deer…on our living room floor! Being firmly entrenched in the suburbs, my only guess is that one of the dogs had been out roaming and liberated it from a neighbor who had recently been hunting, then managed to get it in the house without any of us noticing. We didn’t know any of our neighbors well enough to go say, “Hey, are you missing part of a deer?” So, into the trash it went.
I’m pretty sure the children were eventually identified, but AFAIK their fate is unknown.
Inquiring minds want to know: what was that fetish? 
Not long after I graduated, I was working at a big hospital that kept all the patients’ non-controlled meds in unlocked carts in the hallway; they looked like (and probably were) the kind of cart you would put hardware in, the type with small drawers. One day, I was filling a cart, and found a large vial of injectable morphine in a patient’s drawer; the plastic cap over the stopper was missing, and the stopper had not been opened.
Not only was morphine not kept in an unlocked cart in the hallway for obvious reasons, but the patient didn’t have it ordered, and the morphine was not a brand that our hospital used. I took it to the pharmacy and documented my find, and we never found out where it came from.
Sorry bout that! I was young and drunk.
Women being desperate to pee, and then peeing in their clothes. Or sometimes just underwear.
The summer before I started 8th grade I found a bag of porn mags at the local park. I’m talking paper grocery bag 3/4 full of stacked magazines. They weren’t playboys either. The bag was filled with a wide variety of titles that covered all of the normal perversions and quite a few of the weird ones. In half an hour of reading I went from ‘sex is something that happens with naked people’ to ‘sex is something that happens with naked women, men, handcuffs, rope, large rubber things, paddles, whips, and a few other things I wasn’t sure about, sometimes all at the same time’.
Here’s another unusual thing I found.
I was in my church parking lot on my way into a Sunday service, and saw a large piece of orange paper blowing around, so I picked it up, thinking it was just litter. It was actually a very old newspaper page, and the newspaper was from the city I grew up in - a city 200 miles away from the town where I was living at the time. 
The page had no date, so I Googled some names and events mentioned in stories, and it appears that the newspaper page was from 1947. I still have it somewhere.
There weren’t any other pages blowing around, either.
Actually shoes concealed in the fabric of a building are a thing. This Wikipedia article covers a lot of explanations from protection against witches to attracting friendly household spirits.
We remodeled our 19th century farmhouse last year and found a large silver serving spoon under the floor. I put it back, in case it was the reason the house had been standing for ~160 years.
Not me but my friend…she was driving to her mom’s house and came across a lizard chilling in the middle of an intersection. Maybe not weird in Arizona but if you see this in Ohio it’s going to be somebody’s lost pet. It wasn’t small like a gecko, more like a bearded dragon.
It wasn’t a super busy intersection, this being a small town, but it was rush hour and it was busy enough that it was dangerous to both the lizard and my friend to be walking around in the intersection.
But she stopped the car and worked her way over to the lizard - only to find that it was a rubber toy that someone had … dropped? … in the middle of this intersection.
She didn’t get close enough to pick it up. I saw her later that day and we drove past the spot but found no lizard!
Did you use a laundromat?
Dropping the Planning car off at County Fleet maintenance, I was walking past a row of Sheriffs cars and found a rusty pair of nipple clamps on the ground. The guy with me (to bring me back to the office) had no clue what they were and I did not feel like telling.
Growing up I had an eccentric great aunt who was a wild child of the 1920’s. In 1932 she did an about face married a man several years older and they bought a farm where they farmed the rest of their lives. They were childless and we were the ones that keep in contact with them in later years. They died two years apart in the late 1990’s.
Cleaning out their house in her study I discovered a series of pen on paper drawings, very nicely done. All of my aunt nude in various poses. Some of them were quite risqué beyond the fact they were nudes.
My father looked at them and said “Well, from what I heard, doesn’t surprise me”
I still have them.
That reminds me that a few years ago, I went to officiate an out-of-town football game and I had the crew park their cars on the university campus where I work.
When we came back in the wee hours of the morning, there were a few students in the parking lot beating a hasty-but-nonchalant retreat on foot, and a campus police car keeping an eye on them.
As we got in our cars to leave, one the guys found a freshly purchased case of Miller Lite under his car. I guess the students had stashed it to hide it from the cops and planned to come back after the heat was off.
Instead, a few 40-year-old men split up a case of cheap beer and took it home.
There was a laundry room in the basement of the building that I used. The peanut didn’t look like it had been through a washing machine, but maybe it got left in the dryer or something? It still seems unlikely to me, especially since my sheets had probably been on my bed several days before the peanut discovery.
Do you have a dog or cat that might have placed it there? Otherwise I’ll have to go with “ghost.”
Perhaps it was the result of a Peanutgeist.
80 degree day in April, and I have a purple cast on my arm. I spot a 5 foot high stuffed Tweety Bird in a trash can. I carry it home.
I daresay I’m the only person who has ever carried home a five foot high stuffed Tweety Bird on an 80 degree day in April while having a purple cast on my arm.
Was the window open? The local crows might love youand want to feed you.