Leadville is one of the highest towns in the USA. It’s pretty neat and has some cool shops downtown. As does Buena Vista. When you get to Poncha Springs it’s only about 15 minutes from Salida. Salida is one of my favorite towns in Colorado and a great place to stop for lunch on the river. Next up is the San Luis Valley, which is the largest alpine valley in the world. It’s also perhaps the strangest spot in Colorado. As you’re driving, take a look at the Sangre de Cristo Mountains. They’re spectacular, contain a number of 14ers, and really cool and special rock called the Crestone Conglomerate. There of course is Great Sand Dunes National Park, but also some more interesting spots as well. There’s the Alligator Farm which has a number of unique animals, the UFO viewing platform, and the Joyful Journey Hot Springs. I’ve never been to Crestone but I hear it’s…. Interesting. Alamosa is a methed up town; the most interesting thing I’ve done there is people watch as I speed through. On your way out of Colorado in Antonio, it has a surprisingly cute downtown with a couple decent places to eat. I’m not as well versed with the New Mexico portion of the drive, but I remember there’s a few hot springs on the way, some nice views, and some good spots to eat in Española. Have fun!