CheckoffthefourcornersArizona,Utah,ColoradoandNewMexico...
问题详情:CheckoffthefourcornersArizona,Utah,ColoradoandNewMexicoarenotsimplytheonlyfourAmericanstatesthatmeetatasinglepoint,buttheyalsohosttheUS'sgreatestconcentrationofnationalparks.Thisistheplacetoc...