This was a recent one, but oh boy. Not the weirdest I've had, but here's one I'm more comfortable with sharing.
I actually had this one pretty recently, about last Thursday. Also another thing, the characters were all cartoony but everything else was realistic.
I had a dream where I was Meg from Family Guy (!?!?!) and the Griffin family wanted to go on vacation. So the family time-traveled back to 2002 for some reason by getting into their car and driving off road (???). Suddenly, we were in this small, Midwestern-looking town. For reference, picture something like this, except the buildings were much more split apart, and there were less of them. Oh yeah, also everything was brightly saturated and colorful for some reason.
Next, once we got out of the car, Peter told everyone to do whatever they felt like, so I started wandering around the town. There was no one else around, because y'know, it's a dream. One of the buildings I remember going into was this car wash place, or it was supposed to be one at least. There was a white-painted brick wall and green waxed flooring. Get this: there was some mop-thing that spun in a circle in the tiny building, and I had to jump over it.
Another building I went into was a pizza parlor place, then again, it was supposed to be. This time, there was a checkered wall and a blue waxed floor, and Brian the dog was there. He was standing around doing nothing, until this tall, all-green man with cartoonishly big eyes walked into the place, and then Brian said, "Watch out! It's the robot!" (with all honesty the green man looked nothing like a robot lol). So the green man chased after me, and I had to get away from him. Brian was still in the background not doing a thing, probably because I was Meg (lol). I eventually get caught by the green man, and he stares into my soul. I was freaked out mainly because of how weird he looked, but I wasn't terrified as if it were a nightmare. The green man tosses me out of the building and then disappears from existence. (???)
There was a huge time skip, and now the Griffin family was walking in a fancy park at dusk. There were flowers all around, the sky was pink and orange, but it wasn't overly saturated anymore. There also was a stream with a fancy white bridge going over it, like this one:
I'm right next to the stream, then bam! I fall in for no reason whatsoever. All of the sudden, the water becomes muddy and starts flooding. Peter shouts at me, "Keep your mouth closed! If you don't you'll get sick!" I'm fighting my way to stay above the water, while everyone else is just standing there and doing nothing. At last, the water calms down and I find myself on a hill just below the bridge. Okay, this is weird; there's these flowers on the hill, then I started digging them up, swimming to this other hill, and plant the flowers on the other side. (??????????????) My alarm then woke me up from the dream, and it's 6:32 in the morning. So there's that for you.