The room is cool, not cold. It has hardwood floors, which have been painted a faded blue. There is an old carved bed, a beat-up armchair, a threadbare carpet and a small porcelain lamp with a frilly shade. There is one small landscape print in a frame on the wall.
The trees are old and tall, but it is still light. there is a mixture of deciduous and coniferous trees and the forest floor is clear of underbrush.
There is a clear, narrow path, although it is not really necessary because of the lack of undergrowth.
The path ends in a river. The river water is clear and cold, natural of course, and flows steadily, not lazily or dangerously fast. the river-bottom is fairly deep at the center, and paved with rounded stones of different sizes.
The vessel is like a Greek "calix" cup, with two handles and a mythic painting on the side in black and red paint. It is the story of Odysseus returning to slay Penelope's suitors.
The key looks like any other modern key. Shiny silver metal, one jagged edge, one smooth edge. I probably unlocks someone's garage.