Montreal, Vancouver, and Quebec are not in "the states", people.
Go to Arizona and visit the Grand Canyon and the Petrified Forest.
Go to Arches Nat'l Park in Utah (I still want to do this but I haven't had a chance)
Go to San Francisco and hike for a day in the Muir Woods and spend the rest of your time dodging starving hippies and lunatics. Go to City Lights Books and go record shopping on the Haight, bro!
Oh man, there are so many awesome places to go that aren't cities.
Go to Yosemite.
Go to Big Sur.
Go to San Luis Obispo and stay at the Madonna Inn and visit Hearst Castle for the tackiest experiences of your life (don't stay at a Motel 6).
Go to Southern California and visit visionary artist shrines at the Salton Sea and Watts Towers in L.A. (you'll need a car though).
Don't go to Niagara Falls.
Go to Joshua Tree and pretend you're either Graham Parsons or U2, or Jim Morrison, or in the cast of Zabriske Point. But don't go here in the summer because it'll be so hot you'll feel like you're gonna die and you won't enjoy it.