The phrase "back of beyonds" is often used to describe remote or isolated locations. However, there are a plethora of synonyms available to describe such areas. Some examples include: the middle of nowhere, the boondocks, the sticks, the hinterland, the wilds, the outback, the backcountry, the far-flung, the desolate, the off-the-beaten-path, the remote, and the secluded. These words convey a sense of distance from civilization, something that is popularly associated with going on an adventure or exploring uncharted areas. So, whether you use "back of beyonds" or one of its many synonyms, the message remains the same: you're in for a remote and potentially exciting experience.