Achterbahn

Achterbahn is the German for rollercoaster

It may also refer to:
 * Achterbahn (song), by German singer Helene Fischer 2017
 * Achterbahn (opera), German premiere version 2011 of the opera Miss Fortune by Judith Weir
 * Achterbahn, 2014 German album by Wise Guys (band)
 * Achterbahn (stream cipher)