Astral projection or Astral travel is also known as living in a world of dreams, mostly because many of us actually astral travel naturally during our sleep when we dream. Some people practice a method enabling them to leave their body (like an out-of-the-body experience) and go to wherever they wish using thought; they project themselves within the astral place – a lower form of astral travel.
Crystals can also be used to help with out-of-the-body experiences.
Some out-of-body experiences have been written in book form, but they also are not like travelling with the soul; although the feeling we get when in another place is very similar – total bliss.
One important note on leaving the body. If you don’t have a master to look after it while you are away, astral or hell beings can enter then disturb you when you return. This is how some people become possessed by so-called evil spirits, especially if they are not pure when leaving the body. If you have a master who can help you on the inside and you also follow strict karmic guidelines, then you are very safe. Otherwise, this type of method is not recommended (see more here)