From the Introduction:
All around the corridors of the dungeon wind through the earth. Stretches of straight hallways are broken up by intersections and corners. Occasionally doors lead to rooms or other corridors. Some of them winding about like this one, others ending abruptly in dead ends. Everywhere you look you see the neatly fitted stones of the walls and the stone tiles of the floor, with the wood of doors and the stone slabs of the door frames for contrast at best.
This document contains various dungeon corridor elements sized to fit the letter format of the document and allow for easy printing. On the following pages you can find basic elements like straight corridors, corners, intersections and dead ends. You can print them multiple times and arrange them, or parts of them, into a simple dungeon as you need. These corridor elements were created using the same basic tiles as used in the map Battlemap: Summoning Room and Battlemap: Portal Room to allow you to combine them.