(This isn't a recent dream of mine, but one I remember having last year at some point.)
Edit: Sorry, I really should have put a warning on this. Gore, Very Descriptive Gore.
I wake up and go outside, my sister is there with David, a guy from school that I've been crushing on since the first moment I heard his voice on the first day of school, in my first class.
They are leaning against my sister's car, and grinning at me. I ask them what's going on, and they tell me "Happy Birthday" and say they are going to spend the entire day with me.
We go driving and end up on a bridge. There is an opening into the sewers nearby, and David convinces us to come exploring with him. We wander through the tunnels, paying close attention to how to get back, and find a big metal door.
We open it and walk inside.
There is a tub of something red and gooey. David and I go closer and look.
It's dead babies. Legitimate dead newborn babies all decaying and stewing in their body fluids.
I scream as loud as I can and David grabs my arm and we run as fast as we can back through the tunnels. When we finally reach sunlight again I'm crying and David hugs me until I can breathe again. We call the police anonymously and then leave. We drive for a long time, until almost sunset. We end up on a beach, next to a huge lake. The sand is clean and smooth. David lays out a blanket and my sister goes to sleep in the back of the truck.
She doesn't have the image of those rotting corpses stuck in her mind. I do.
I stay awake for a long time, talking to David as the sun goes down. I cry a lot, and he sniffles a little too, we're both scarred.
Finally we wake up my sister and we go back to my house. David says goodnight, and I go inside and sleep.