The phrase "unknown destination" refers to a situation where you don't know where you're heading or where you'll end up. It implies a lack of clarity about the final point or outcome, leaving things uncertain and unpredictable. Full definition
An attraction to the dangerous unknown destination (physical or spiritual) has away of stirring the deepest part of men (and women) like us. (nakedpastor.com)
Unknown destinations usually make travelers look like easy targets for ripping them off. (policybazaar.com)
And in the travel business there are of course other companies that sell unknown destination but they don't fully embrace the concept. (thenextweb.com)