Question

In the valley of the Green Glass Door.
There is a pool but no water,
apples but no grapes,
school but no learning,
trees but no branches,
teeth but no mouths,
Halloween but no candy,
and mirrors but no reflections.
Why is this?

Answer 1

Only words with double letters are allowed in the valley of green glass door.

And here's a bonus: Green Glass Door has double letters too!