Twilight opened her eyes.  Monolithic slabs of stone rose into darkness on all sides save a large archway standing before her, where a faint ambient glow seemed to filter in.  A light mist concealed the ground beneath her hooves.  It was cold.

Where am I?

A light flashed in the distance.  What was that?  She rose from her haunches and took a step forward.  Something clanked beneath her.  Hundreds of intricately connected, concentric metal rings lay at her hooves, the outermost barely larger than her hoof in diameter.  Worn runes covered their rusted surfaces.  A map?  She lifted it from its setting and placed it in her saddlebag.  It would undoubtedly be useful later.  

She gave the room one last glance.  There was something wrong about it, something unnatural.  A quick trot out of there felt like the best solution, but it was short lived.  

A shiver worked its way up her spine as she crossed the threshold.  She was on the peak of an underground mountain and could see for miles.  Every inch of the subterranean world was a maze.  The ground.  The walls.  The ceiling.  Tiers upon tiers rose above one another, choking themselves with complexity.  No crevice was spared from its twists and turns.  

Far in the distance, in the center of the world, loomed her goal: a pillar of stone that spanned the void, a monstrous sight even from her vantage point.

Twilight’s ears fell back against her head, and she gulped.  A maze this size could take years, even centuries to navigate.  She bit her lip, but then stamped her hoof.

Just take the first step...

And the first step she took.