Hall of Infinite Doors

This door isn't so much a typical wood-slab, but rather a massive collection of spiderwebs strung over a recessed space as a doorway. Though the webs are thick, you can't see any actual spiders there; it's as if they finished their work and went home. There's no knob, either; to pass through it, you'll have to actually pass THROUGH it, breaking the webs and likely taking a good amount with you.

You can sense something on the other side. It's like a psychic smell, a sense of desperation and bitter loss calm enough to be alluring. On the other hand: spiderwebs, ew. You can always go back.