A oddly shaped pyramid with a labyrinth inside, one of the early builds in the Burning Desert. The labyrinth is divided into seven themed zones (the decoration/materials change but it is however pretty basic, no redstone shenanigans). It isn't too long (people usually take 15-30 minutes to complete it) nor challenging. Originally built on a survival server, and cleaned up.

The shader used in the pictures is SEUS Renewed.
Download includes a vanilla structure nbt, a litematica schematic, and also a playable map should you want to try it.