Door Canvas
Mist, Forest Old Man
Road
Bridge & Tree
Crossroads
Summer Fall Winter Spring
Temple (Sanctum)
Palace Library Catacombs (I am wary of attempting a symbol-mystery here)
Pit & Snake or Underworld (maybe the hero talks to the snake instead of slaying him)
Desert (great forms, as the wheel)
Garden, (Seaside Dwelling with Old Man again)
Ocean
Ship at sail
(islands with monsters)
(experience on a shipwrecked island)
(end of the world)
(elves)
Note: the book Pile uses a transition from city (with god-computer) to jungle and finally to desert, from black-and-white to color. I attempt a similar transition without such elemental types, with the risk of abusing the metaphors present.
Alternate world maybe also with Android theme
City (Computer)
(mirror world)
the tunnels
gardens
glass dome
tower pool
wall agora