Field guide No. 157
The thimble greenhouse
Ferns, under silver.
A silver thimble glows with ferns growing inside it, while a tiny gardener climbs a ladder to tend them.
Field noteFerns grow small and gardeners can be found smaller. A thimble is roof enough for both.
Also possible, also breaking scale
Switch to springA gateway shaped like a switch plate is a folly, not a paradox. Follies are allowed.
The cello stairwellA cello with rooms is a dollhouse with strings. Dollhouses are permitted, if rarely tuned.
Impossible forest tunnel at sunsetA tunnel of log ends is just a lot of sawing. The impossible part is the title’s.
Shuttle serviceObservation towers come in all shapes. Feathers would need replacing after every gust.