If you know someone who likes guns, you can easily convince them to take you shooting. There are usually indoor shooting ranges if you live in a place where you don’t have an outdoor range nearby. You can take it one step farther and do some sort of “gun safety” class before shooting as part of the date.
Missionaries are always looking for help to do service, find people to teach or assitance with any of their volunteer activities. Get in touch with some and offer to help them — it’s very rewarding, and you can see what kind of person your date is!
This is another thing that you can do MUCH better now that you’re older. In High School, we’d toiletpaper our teachers houses and people we didn’t like. But it’s a good trick even for people you do like.
This is another big hobby for a lot of people. Flying a model rocket can be done for under $20 (but obviously, some people get much more elaborate). If you are lucky enough to find an event, you can see hundreds of these of varying complexity. But if not, it’s still fun to pick up a starter kit at a hobby shop and build one together then fly it a few times.
If you don’t have access to a remote control airplane (I know I wouldn’t let you fly mine if you didn’t already know how!) you can go to mini-airports where enthusiasts gather all of the time to fly these things. It’s a pretty big hobby for some people, so it’s cool to see what they’ve done with it.
There’s a lot more in hot air ballooning than you would think (they’re harder to fly than an airplane) so it’s hard to get someone to take you up. But if you’re lucky, this can be a really fun adventure. If not, they have hot air balloon events where you can watch dozens of them take off at once.
Lots of people get in to riding ATVs and Motorcycles and camping for days on end at the Sand Dunes. It doesn’t hurt AS bad if you wreck on sand, so there are some pretty crazy people you can watch (or be)
There are lots of cool things to be seen if you’re a tourist outside of your state/country. In Arizona we like to go to Mexico because it’s not too far away and it’s quite a cultural experience.
You probably thought of this one without our list, but here it is anyway. Here in Arizona there are lots of little hills and mountains nearby that can make for a decent 2-3 hour hike
Again, a date that’s probably more for the guy than the girl. You can buy all of the parts you need to build a potato gun for less than 20 bucks (ammunition included!) which is a couple of PVC pipes and an ignition source (like a lantern lighter and hairspray). Good fun — a decent potato gun will go 50 yards. You can find instructions all over the internet.