I forgot to mention a couple items. While in California, stop at La Jolla cove and see the sea lions. There are also many aquariums that are along the coast for you to stop at as well as old missions, most notedly San Juan Capistrano in Southern California.
Also in Wyoming, stop at Oregon Trail Ruts State Historic Site located around Guernsey. These are deep ruts in sandstone from the wagons on the Oregon Trail from the early to mid 1800s.
If you find yourself in New Mexico:
- Petroglyph National Monument (there are 5 separate areas that make up the monument around Albuquerque)
- Blue Hole in Santa Rosa
- The UFO museum in Roswell (whether UFO's are real or not, the museum is full of reports, news stories etc that will make you wonder)
- Carlsbad Caverns.
- Ice Cave and Bandera Volcano
- El Morro National Monument
- Jemez Soda Dam outside Jemez Springs
- Pimentel & Sons Guitar Makers Inc in Albuquerque (family owned custom guitar maker - ask for a tour)
As you head across the country, there are many presidential libraries to stop and visit as well as museums for US, regional, city, state and various industry history and many old historic forts. As you get towards the eastern part of the US it has more hills and thus waterfalls thru Vermont and New Hampshire.
There are also a lot of automotive history museums in Ohio and Indiana. Elwood Haynes Museum, National Auto and Truck Museum, Indianapolis Motor Speedway Museum, Studebaker National Museum, National Packard Museum, and the RV/MH Hall of Fame Museum. In North Carolina, there are: Hendrick Motorsports Museum, Richard Childress Racing Museum, Nascar Racing Hall of Fame, and Richard Petty Museum, among others.
For the eastern portion of the country, there are many bridges, tunnels and parkways on the east coast that don't allow the use of propane while driving the vehicle. I've been to NYC once (it was enough) and you're going to have to either take a bus, subway or be part of a tour because driving an RV thru NYC and especially parking one, will be a nightmare. Street parking is pretty much non existant and an RV won't fit into most parking garages. Do your homework. You may also want to read thru this thread:
Propane Use While Driving
Pennsylvania:
- Drake Well Museum (birthplace of the modern petroleum industry)
- Pennsylvania Lumber Museum
Massachusetts:
- Normal Rockwell Museum
- Emily Dickinson Museum
Vermont:
- There are many old covered bridges along rivers in Vermont.
- Park-McCullough Historic Governor's Mansion
- Bingham Falls (also the gondola ride to the top of the mountain)
- Dog's Head Falls
- Cady's Falls
- Big Falls State Park
- Cold Hollow Cider Mill
New Hampshire:
- Beaver Brook Falls
- Flume Gorge Visitor Center(hike to: The Basin, Avalanche Falls, Aliya Falls and Kinsman Falls and hike the "flume")
- Daniel Webster Birthplace State Historic Site