Matt and I went to Meramec Caverns, which is about an hour west of St. Louis. I went there as a kid with my Meemaw, but couldn't remember much so I decided Matt and I should go. It was the hideout of Jesse James back in the day. It was about 59 degrees inside the cave and about 100 + outside. Matt and I had to wear pants and jackets, so it was a pretty nice change of scenery. We saw some pretty amazing cave formations and I have a few pictured below.
This is the loot rock where Jesse James and his posse would hide their loot. They also escaped the law from here several times, too.
It was pretty amazing to see the beauty of mother nature.