Here are some of my favorite ones. I put the translation of the french common name, since some are interesting!
Ophrys apifera. (honeybee orchid)
Ophrys fuciflora (bumblebee orchid)
Aceras anthropophorum - natural hybrid with no clue what (hangman orchid)
Orchis militaris (military orchid)
Himantoglossum hircinum (billygoat orchid - it's a stinker, thus the name!)
I think there are probably many everywhere in the USA, but the problem is being in the right place at the right time!!