One night when we were lost at sea, our ship crashed onto the strange landmass. We discovered that it was not an island but an ancient city. Primitive ruins of a mighty metropolis whose presence felt most unnatural in the endless void of the ocean's open water.
My fellow sailors gazed upon the its scale and quivered at its unsettling, behemoth architecture. This was not made my any human civilization. This was something beyond human comprehension. Foreign, indescribable, non-Euclidean geometries. A perverse insult to natural law. Archaic yet highly advanced. A primordial, ancient place. Lost to the epochs of time. Forgotten. Waiting. Slumbering. As if it was still alive.
As we reached the shores, we approached what was perhaps the largest staircase we had ever seen. Its size made us like that of microscopic insects. Enormous slabs breaking apart. Dilapidated from time. Enormous cracks creating caves and crevices that felt more at place in a mountain. These were steps made for giants; fit for the legendary titans of antiquity. The kind that people of ancient times would fear and immortalize in mythology, as a dreadful reminder of how powerless man is to the cosmic forces of that he holds no control over.
When the crew reached halfway up the staircase, the ruins began to tremble with the force of an earthquake. But such immense tremors came not as a continuous shock, but in intervals. They were footsteps. The stone gate at the top of the stairwell opened with a sound like an avalanche. Out from the blackened void of those accursed corridors came the most unspeakable thing men pray they should never lay eyes upon.
It was a gargantuan colossus. Humanoid in form. But alien in presence. It has two large strange lights peering out from what I believe were its eyes. It's head was like that of a cephalopod and over its terrifying maw were massive writhing tentacles, whose movement was enough to dissipate the cloud that surrounded it's neck. With the clouds gone, t's repulsive appearance drove those who stared at it too long to madness. Men reduced to screaming, writhing creatures. All cognitive thought lost in an instant. Crippled in body as lifeless husks. Their eyes screamed terror, as it their souls were trapped in their own bodies.
He held around his waist a strange gargantuan object. A wide circular hoop of some unknown construction. Nearly as big as it was. Nearly as sickeningly and alien in design as it was. With a quick motion, the hoop started spin and gyrate around his stomach. The air around the beast began to spiral like a cyclone. The momentum of such a colossal structure pushed the air forward at immense speeds. Its strength formed a giant wall of wind, coming for us with the force of hurricanes. Hiding in the huge cracks of the stairwell, I was safe from the gale's fury. I called to my companions to come with me, but they had foolishly looked back at the beast, and they too befell its wrath. The glowing gaze from the eyes surrounded them with an unholy light. I turned away to spare my eyes, but their screams echoed from an agony never felt by man. There are no words in the human language to articulate how indescribably awful their fates were.
When the winds stopped, I made my way deeper into the cracks of the stairwell, descending down into the hollow caverns. Feel into a pool of water. A saw a crack in the wall that revealed moonlight and I swam out and saw the boat. Pushed out but still tethered land. Badly battered but still floating. I climbed aboard and cut the rope. I set sail and never looked back; but the screams of my crew mates still haunt me to this day. I do not know exactly were that city was and I hope no one ever finds it. For I shudder to imagine the day that ancient thing awakens once more only to reek havoc on mankind. That great terrible leviathan of the ocean.
(I wrote up this story after looking at this:
I was gonna write this as a comment, but that would be bad comment etiquette.