There's something I left out of the story of our time in Land Between the Lakes -- it was brutally hot and humid. More humid than I've ever experienced, including [Angkor Wat, Cambodia][1]. It put us in the mood for something, well, cooler. Or at least less humid. So we headed to St. Louis. Because we're not that bright. Actually it was strange, we drove north, up through Kentucky, and the minute we crossed the state line the humidity dropped about 50 percent and it was actually tolerable again. I didn't look it up, but I know what [earth.nullschool.net][2] would have told me -- we'd just crossed into a mass of air moving down from the north. It was short-lived, but welcome nonetheless. We stopped off at a mounds site on the way, and went through the somewhat creepy town of [Cairo][4], which has more or less been abandoned. It's about five miles of abandoned buildings slowly being taken over by vegetation. We stopped for one night at the Trail of Tears State Park, which had a campground right on the Mississippi River. We ate an early dinner and spent the evening down by the shore, watching the tugboats pushing their loads up and down the river. I managed to refrain from any [Clarke Griswold impersonations][3]. And there was a train, you can't go wrong with kids and trains (which fortunately did not go by in the middle of the night, because you can go wrong with grownups and trains). By the time we made it to St. Louis it was back to being hot and humid, doubly so because it's a city and cities are always 10 degrees hotter than anything else. We came to St. Louis pretty much for one reason -- the City Museum. Everyone who said we had to go there, and there were half a dozen of you, became real vague when we asked what it was like. And now it's my turn to be real vague -- I can't really say what the City Museum is exactly. It's like [Antoni GaudÃ][5] and Jules Verne got together and built an amusement park. It's sort of for kids. There are definitely things only kids were small enough to do, but then there's plenty for adults too, enough that every evening it becomes 18+ and stays open until midnight. Normally I'd say that a picture is worth a thousand words and insert of few here, but it's also a really difficult place to photograph, it's massive, full of dark areas with hidden passageways and tunnels. There's a bunch of slides and wire scaffolding stretching up about five stories on the outside, with an old fire engine, a wire rocket, an old cutaway airplane and a few other odds and ends mounted near the top. It's all connected by narrow scaffolds and slides. It's full of sharp edges, metal stairways and a good old fashioned modicum of danger you don't usually find in the United States of Safe and Boring.