Cottonwood, Arizona — public restroom inside Ming House, a Chinese restaurant, next to the sink.
Carpenteria, California — inside the box of a vintage Mad Magazine boardgame, at Toyland Toy Store.
Pensecola, Florida — supply closet on the second floor of La Quinta Inn behind some boxes. (Portal broken.)
San Luis Obispo, California — Dipotics Factory, behind the soda machine in the break room.
Bar Harbor, Maine — at College of the Atlantic, in Kate Jennings’s old dorm room.
Near Lawrence, Kansas — at the bottom of Clinton Lake. (Possibly more of a time warp.)