Over the past few thousand years, humans have gotten really good at making stuff: useful stuff, decorative stuff, destructive stuff, and stuff that serves no earthly purpose at all.
When it comes to identifying this never-ending cascade of stuff that people randomly find and are subsequently stumped by, there's no better place on the internet than the r/whatisthisthing subreddit.
I'm a glasses wearer and have never gotten these things, so I'm definitely intrigued. The piece of plastic is a template for cutting new lenses, the black thing is a grinding template and the string holds lenses in a rimless frame.
This appears to be a piece of the wing of a military target drone, which makes perfect sense given where it was found.
It turns out the former owner of this house was a fisherman, which perfectly explains this box. It used to be a bait tank for storing fresh bait in.
If this was a video game, those mounds of dirt would be there solely for cars to launch over. But this is real life, so there's a better answer: these are for wildlife such as deer and antelope to get over fences.
This is most likely a cold box — a small area that brings in outside air to cool things down in lieu of a refrigerator or ice box.
This is a relic from back in the days when shoes were made by hand. This machine is for pressing eyelets — the little holes the laces go into — into shoes and boots.
These wands are designed for sculpting and marking or writing on clay before it's put into a kiln.
So we know that this is some sort of, well, venom alarm, but why? Aquariums have all sorts of nasty venomous stuff, such as zoanthid coral, which is potentially deadly to humans.
There are plenty of modern methods for tenderizing meat, but if you're the old-school sort, you'd probably use something like this: a handheld meat tenderizer.
If you're the kind of person who knows what fondue is, you probably identified this as a fondue fork almost immediately. Fondue has been out of style for decades, so fewer and fewer people would recognize this.
This is one of those highly specific things that someone somehow identified. This is the remnants of a light bulb-shaped eraser from the '80s.
It looks like these are poison pills, and if you're a moth, they kind of are. They're pheromone capsules for trapping moths in a glue trap.
Are the bars melting or is there a purpose here? Fortunately, it turns out there's a purpose: these 'belly bars' are designed this way to allow flower boxes to be installed.
OP was on the right track with this, as it is intended for bikes. It isn't for locking them, though. It's just a way to prop them up while you sit on the bench.
I was thinking this would be something fancy and Porsche-specific, but nope — it's just a hanger, same as the hanger in practically every car.
This displays cuneiforms along with the logo of France's national museums. It's more likely than not that this is simply a museum souvenir.
Have you ever wondered how court stenographers do their thing so quickly? One aid they have is a stenographer's mask to help them dictate — and that's exactly what this thing is.
This is a type of fascinator, a decorative headpiece. It's a reference to Ned Kelly, an Australian outlaw and folk hero who famously made homemade body armor for his final shootout.
The olive green coloring suggests that this has some sort of military application, and it does. It might look like a squished water bottle, but it's actually a gas mask filter.
This is a celestial globe. Like a regular globe, it shows you where stuff is — but in this case, the stuff it's showing you is constellations.
