Norwich, England had its own mustard museum, run by Colman’s, the biggest British mustard company. Closed 2017. I went there a couple of times when I was at University locally.
The British Lawnmower Museum:
And in Belgium there is a Carrot Museum:
In the basement of the Somerville Theatre in Somerville, MA you can find the Museum of Bad Art.
http://museumofbadart.org/collections/
I hear it’s looking for a new home, though, so if you’re interested…
I recently went to a wedding in the Rochester area. There were pamphlets about the Jello Gallery in the motels and billboards on the highway. If it hadn’t been so long since I saw all of the other relatives attending, I might have made a side trip.
There’s the Spam Museum in Austin, Minnesota. I’ve never been, so I can’t give a review.
I’ve heard that there’s a Roto Rooter Museum, where they keep the yearly winners of the longest root removed from a sewer pipe. At one time I could find it by googling, but can’t now. Maybe it is defunct.
This is on my bucket list! I once saw a documentary on it and am entranced with it.
The penis museum in Reykjavik is small but it will grow on you. They supposedly have a penis of every mammal native to Iceland - including humans.
There used to be a Museum of Questionable Medical Devices in Minneapolis. It has now gone to a strictly on-line venue.
In Rome, on the Via Veneto, there is the very macabre Museum and Crypt of the Capuchin Friars (scroll down), which features several rooms completely decorated with the bones of thousands of ex-Friars. They don’t allow photography, but are happy to sell you postcards.
Ava Gardner has a museum close to me but I have not been there. It’s close to where she grew up.
There is a group of engineers and scientists at the University of Minnesota whose specialty is the behavior of tiny particles floating in air – dust, smoke, fog, mist, and so forth. They have several of the earliest versions of instruments that measure airborne particles, such as differential mobility analyzers, aerodynamic analyzers, laser particle counters, diffusion batteries, condensation nuclei counters, and so forth. They keep these locked away someplace safe but will sometimes show the collection off to guests, and I’ve been treated to such a show. I think this amounts to an extremely specialized (and unnamed) museum. Or at least, this was the case about 20 or 25 years ago.
Maybe I should check this out - California Foundry History Museum, Lodi, CA.
Bakersfield has a museum dedicated to Buck Owens. That’s pretty specialized. It’s part of a music venue.
Too bad it’s not in Kansas.
d&r
We just had this one on the local news and my first thought is who w9uod go to that? It’s a museum dedicated to a street in Denver, Colfax avenue. The claim to fame if I remember my local history correctly is that is the longest continuous street in the US. I have no idea why its history deserves a museum.
Re: The Museum of Jurassic Technology…one of my favorite exhibits there was a portrait gallery of Russian space dogs. 
The Santa Cruz Surfing Museum is indeed small–it’s a 10 minute stop unless you decide to read every single article and watch all the videos.
The Morro Bay Skateboard Museum is pretty cool. I was talking to the curator Jack Smith and discovered that we were teenagers the San Jose area around the same time…but he lived up on Mt. Umunhum where his dad was stationed.
Blast it, so many of the museums I clicked on this thread to post about have already been metioned - I guess that’s a good thing about this message board, right? Let’s see…what strange, too-specialized museums have I been to that have yet to be mentioned…?
Cole Land Transportation Museum in Bangor, Maine
Wonderful World of Dr. Seuss in Springfield, Massachusetts, which does a FANTASTIC job of capturing the spirit of his life and works.
American Clock and Watch Museum and New England Carousel Museum, both in Bristol, Connecticut
Treasures of the Sea Exhibit in Georgetown, Delaware - dedicated to the recovered artifacts of a specific shipwreck
By the same token, there’s also the Arabia Steamboat Museum in Kansas City, Missouri.
I’m sure I can come up with more…I’ve (thank G-d) had the privilege of doing a LOT of traveling around the United States and Canada.
The National Bottle Museum in Ballston Spa, NY is actually a very cool little place with an especial focus on early American glassblowing and bottle design. They also have a hot-glass teaching facility if you want to learn how to blow glass yourself.
Two that aren’t too small, but may be obscure enough for the list. My wife and I liked them both:
The Museum of the Moving Image
The Newseum.
And, one of my favorites (I’ve been twice) - EBR-1.
St. Louis used to have a bowling museum. About 10 years ago, it was relocated to Arlington, TX. I saw it while visiting St. Louis some years back, and found it quite interesting even though I’m not much of a bowler.
There’s a Wizard of Oz museum in Liberal, Kansas. It’s part of their county museum.
The first college of chiropractic has a museum, concentrated in the main building but exhibits are scattered throughout the campus. I’ve been there, and it’s very interesting to see how the profession changed over the decades, and especially the participation of women. Let’s face it - when it was invented, it was as good as anything. Unfortunately, too many of them still think so.
I went to a place that claimed to be a “Museum of Famous Rocks” in a park near Nanjing, China. It was actually more like a small collection of somewhat unusual-looking rocks.
Ooh, that reminds me:
The Japanese Museum of Rocks that Look Like Faces…including one that looks like Elvis!
Once, as I was walking in San Francisco on my way to the Cartoon Art Museum, I passed a temporary exhibit of The San Francisco That Never Was (paraphrased). It was a collection of models and drawings of proposed buildings and other developments that had never been approved, never gotten funding, or otherwise never gotten built in San Francisco. I really wanted to see it, but it wasn’t open yet and once we were done with the CAM, we absolutely had to go the the Exploratorium. The Exploratorium is definitely not too specialized.
I don’t know if it’s still there, but there used to be a lightbulb museum in Baltimore.
I recently went past the firehouse museum, also in Baltimore.
The state fairgrounds in Timonium Md has a small museum dedicated to the history of the MD state fair.