The Ancient Worlds Theme Park was a theme park on Dewyn.
The park had a huge collection of Earth artefacts. (COMIC: Minor Trouble) Some time before the Tenth Doctor and Martha Jones visited, a Chiffala mercenary crashed on Dewyn, and created chaos in the park. The Doctor stopped him, chained him up in the park, and said he would return to check on him in a few months. (COMIC: Crimes and Punishment)