Everyone has had some experience that they felt defied rational explanation. Perhaps a ghostly encounter, or a prescient dream. There are many ways to explain these experiences. Many of these types of experiences, such as astral travel or seeing visions in a crystal, are apparently skills that people can train themselves to be able to experience at will.

These experiences cross cultural boundaries - almost every culture has some tradition of induced altered states of consciousness, for example.

This section is devoted to articles examining or describing the kinds of experiences that are often called 'mystical'.