It's a warm room with orange carpeting and no furnishings or windows. I was sleeping on a pillow, the only thing in the room besides me and the orange carpet.

There are a lot of ferns and tall trees with trunks one could live in. It is bright.

It's narrow but well-traveled.

It's natural, it's a little river. I can see the large rocks sticking up from the water.

It looks like a potion bottle, or a fancy perfume bottle

It's made of brass, it's large and antique-looking. Maybe it unlocks a gate or a barn or something.