This chapter describes the process of design and development of the Virtual English Adventure in Second Life. The in-depth description and explanation of designing and developing the tasks and activities involved in the Virtual English Adventure project provides the scale and amount of time and effort required to utilize a virtual tool for educational purposes. The Virtual English Adventure is particularly designed for English teaching and learning. The virtual world configurations, such as level tests, teleporting, missions, e-learning, interaction, gaming, and learning-facilitators, are related to both learning theories and language teaching pedagogy. Based on our own experiences, there are some important recommendations for instructional designers and researchers to consider when they design and develop the educational use of a virtual world.