Urban Explorer (also known as The Depraved) is a 2011 German horror film directed by Andy Fetscher and starring Nathalie Kelley, Nick Eversman, Klaus Stiglmeier, Max Riemelt, Brenda Koo, and Catherine De Léan.

The destination for the illegal tour, through a labyrinth of tunnels, sewers, and catacombs, is a special bunker, the Fahrerbunker (Hitler's subterranean garage) which is the center of many legends, where they expect to find the debris of forbidden Nazi wall murals.

After the group's local tour leader Kris (Riemelt) falls and breaks his leg, Marie (De Léan) and Juna (Koo) go for help and find their way back to the club.

Justin Lowe of The Hollywood Reporter gave the film a negative review, writing, "Starting off with an intriguing concept and the unique underground Berlin setting, screenwriter Martin Thau and director Andy Fetscher rapidly squander their advantage with a prosaic visual style, weak characterizations and predictable plotting.

A few cringe worthy scenes doesn’t make up for a threadbare plot, a lack of likable or relatable characters, or some good old fashioned realism.

"[3] Robert Koehler of Variety gave the film a more positive review, praising Fetscher's work on the film, writing, "his one-man-band combination of direction, lensing and editing proves crucial, displaying a balance of craft and patience in building layers of suspense under a horrific setting that goes beyond any urban explorer’s worst nightmare.

"[4] Gareth Jones of Dread Central awarded the film a score of 3/5, writing, "Ultimately effective, and indisputably horrific, it’s a shame that it just takes far too long to get where it’s going – meaning that for some the horrors to be explored here may just remain buried in the undiscovered reaches of the later runtime.