The Lost World - a map from Quake 3 Arena and Quake Live (Q3DM13 - Lost World). Converted to QuakeWorld by Jeff McWorther and Muff1n.
The map features numerous examples of Doom imagery, such as the Icon of Sin. One of the rooms has a section of torn flesh held by metal bars in its ceiling, revealing a fanged mouth. The whole thing resembles the infamous Goatse shock site (which was also referenced in Doom 3). One of the most popular duel maps in the history of Quake 3.