The Penninsula Creamery. We got ice cream samples. It’s still what comes to mind whenever I hear the words “field trip”.
It was either to the silkworm museum in Tokyo or to the Great Buddha of Kamakura. (Military brat.)
I grew up in a small town in a very rural area. No towns over 5,000 for almost 30 miles.
Never went on a field trip.
Probably Wildlife Prairie Park which is pretty much the standard field trip in our city.
4th grade, I think, to the Henry Ford Museum.
The two things that made an impression on me were the chair Lincoln was shot in, and the Oscar Meyer Wiener mobile.
To a local high school to watch a play.
We went to a Pepsi Cola bottling plant. Very noisy place but interesting. We all got a free bottle of soda at the end which I loved (even if it was Pepsi) because I wasn’t allowed it at home.
I grew up in New York City. I went to live with my aunt and uncle in Indiana when I was 14. That’s when I saw my first county fair. It was amazing and a little scary. My eyeballs almost fell out of my head.
The earliest field trips I remember were to the local post office and to the local police station. I grew up in south central Connecticut, so later field trips were to the Peabody Museum in New Haven, the American Museum of Natural History, the Metropolitan Museum of Art, Sturbridge Village and Mystic Seaport and Mystic Aquarium. Later in high school, we went to FDR’s house and presidential library in Hyde Park, New York. (FDR and Eleanor are buried there, and the tombstone is or was surrounded by hedges. So several of my classmates supposedly took a selfie of themselves standing on the tombstone and mooning the camera.)
The trip to FDR’s house was usually combined with one to a nearby Vanderbilt mansion.
Must have been close to the last day of school, either Kindergarten or First Grade. We all took the four block walk to the town’s only restaurant for soft serve ice cream cones.
Some zoo somewhere. Just think, every one of those animals are long since dead now. 
Our town had a Colonial Bread company. We went to watch bread being made. We also went to the planetarium often.
In first grade, we went to see the American Freedom Train when it came to our town, San Jose, CA.
I don’t remember where we went, but I do remember that LeRoy Shadwell threw up on the bus, and those of us seated behind him all had to pick up our feet whenever the bus went uphill.
The Bandini Fertilizer plant in Vernon, CA (apparently; that’s where they are now, anyway). We all went home with a philodendron and a small plastic bag of Bandini Black Magic fertilizer. Pretty sure I neglected mine to death within a week.
Maybe not the tortoises. And possibly the parrots.
The first zoo that I remember visiting was on a school field trip to the Buffalo Children’s Zoo, where we watched a tapir grow erections when we fed it carrots. Once engorged, it would then step on its own dick, causing flaccidity, so we’d feed it another carrot. I didn’t bring a camera, but some kids did.
On the way back to Canada, Obby-Bobby was locked in the washroom the entire way.
Times were different then. Today, we would be arrested and rendited to Guantanamo for being guilty of international human child trafficking after having having spend a day creating bestial child porn.
We lived at Otis AFB on Cape Cod. Our fourth grade class (1958, I was 10) went on a field trip to Plymouth to see the Pilgrim village. I had my mother’s camera and a roll of film, which I didn’t know how to put in. I kept asking the teacher to help me, but she didn’t get around to it until we were on the bus headed home. So my only pictures were out the window of the bus on our way back.
Walking to the dairy farm operated by a college in town. Second or third grade? It was maybe a mile anda half one-way.
In nursery school, we went to the downtown Rich’s (a department store like Macy’s that existed in Atlanta back then) so we could ride the Pink Pig. It was Christmas time. That was the first field trip I ever took.