RoadsideAmerica.com
Well maybe not an essential resource, but if you’re looking for the offbeat and hidden attractions in a particular state, they’ll help you find them. Amazing sites like Subterra Castle (Missle Silo Home), tiny churches, and of course the beloved Silver UFO House located along Highway 12, Buxton North Carolina, which is up for rent by the way!

Photo by greenkayak73

You can find other space ship houses (some more for rent, as well) at spaceshiphouse.com.