I'm pretty proud of the "dungeon" I made for my first Numenera session. (Numenera takes place in an inconceivably far-flung future Earth where medieval-level humans exist amongst the detritus of multiple collapsed hypertech civilizations, making use of the bizarre "magic" that permeates the landscape as best they can.)

Upon hearing that strange lights had appeared in the sky in the direction of an otherwise unremarkable tall, jointed obelisk used as a local landmark and called "Fiddik's Finger," the PCs ventured off to determine the source of the disturbance.

When they reached the "Finger," they found it curled up into a rough square, loosely gripping a massive ring-shaped structure which nobody had ever seen there before.

Entering the Ring through a mirror which reflected them backwards (they had to walk backwards into the mirror to pass), they found a structure in disrepair, dust and decay everywhere. The entire Ring rotated at unpredictable intervals, throwing them off balance. There were human-sized corridors, but also narrow tunnels they were too afraid to explore, as well as doorways and rooms clearly intended for creatures much larger than men.

They encountered metallic trees bearing fruit with human faces that sang discordant songs; a virulent fuzzy, mold-like growth that consumed artificial materials; unidentifiable corpses; and then, suddenly, crossed into a region that was not in disrepair, but pristine.

Here, there was light that came from the walls, images, sounds. They fought automatons that appeared to drive them away, and passed into another region of oversized rooms; here, the gravity was twice as strong as normal, and they had to struggle to move about. They found a machine which spoke to their minds and answered questions, albeit in difficult to understand images. This was how they learned that the Finger was a repair station for the Ring; they'd caught up to the repair process (remember the Ring's periodic rotation?) but that process was nearly complete. Unless they wanted to go wherever the Ring went, they had to get out, and fast!

There were some close calls trying to run full tilt through the high-gravity zones toward the exit, but they made it just in time to watch the Finger unfurl, point back at the sky, and launch the Ring into the black.