A couple weeks ago, I got to go check out Yellowstone Park for a few days along with my family. I wasn't really expecting much, since I prefer cities to the great outdoors, but this one felt like a trip to Mars during many points, and as such could be classified as an exciting trip, despite the dearth of art or good food. The park is mostly famous for having the highest concentration of geothermal formations in the world, all in crazy colors, emitting different sounds, of all shapes and sizes. While it is quite dangerous to touch or go near one of them, just looking at them is an experience in itself. It is amazing that the park hasn't succumbed to the tourist trap and is still in mostly the same condition it was hundreds of years ago, save some campsites, a few lodges, and lots of boardwalk.
My father evidently had a goal of seeing all 10,000 geysers/hot springs/steam vents while we were there, and while we didn't get to all of them, we did see at least a couple thousand. This left me with lots and lots of photo-taking opportunities, so I'm sharing a few: