While it is true that most Dungeons and Dragons campaigns start in a tavern, not all do, and even in those the character of the environment can play a huge influence on the flavor of the campaign.

Design an environment: tavern, village, town, setting that launches a fantasy role playing campaign. In this context, fantasy can include any genre including science fiction and horror. This environment should include one or more maps, descriptions and any supplementary information required to begin play. The nature of the on-going campaign should be left generic for others to benefit from your creation, although hooks to future adventures can be present.