There are at least two kinds of traveling without the physical body.
One is astral projection. We know we are doing this when eveything looks and feels as if we are physically present. We have actually left the body. We can see there are "two" of us.
One of the major hazards with astral projection is that another entity can take over the body if it is not properly guarded.
Another mode is remote viewing or mind travel, We know that we are sitting in our chair. We see what we are looking at as in a dream. There is a certain disconnectedness in the visions rather than the flow if we were actually progressing along a route.
Mind travel is less hazardous than projection. Parents and other guradians may find it useful to check in on children and charges, It can also be used to check out conditions on one's immediate travel iternary or at a location one has an interest in. It is used by the blind to "see" where they are intending to go.
Warning: Neither way is safe if snoopng around places where visitors are not welcome. There are those quardians who are skilled at detecting any and all changes in energy and who pick up the slightest intrusion into the space they watch. Some of these have a rather low tolerance of intruders and may respond excessively.
There is a third way. That is to ask self and wait for the answer. This is the intuitive way. Our presence never leaves home.