Methods, apparatus and data structures for providing a user interface which facilitates decision making

A user interface for facilitating a decision making process, such as planning a trip. A unified view of various types of information related to an event may be provided. The unified view may be presented in a simulated three-dimensional environment having different types of information depicted on different windows. Different types of information related to a common event may be visually linked. A window showing a particular type of information may be brought into a focus view for closer inspection by a user. Alternative decisions may be depicted to permit vagueness or uncertainty, particularly at early iterations in the decision making process.