TIL about this guy Karl Bushby of Hull, England. He has been on a 25 year trek around the world on foot. He gets to the Caspian Sea and has to cross it because he can’t go around to the south because Iran and he can’t go north because Russia. IDK I think he should try. My guess is either country would let him in but his home country might fuck with him, freeze his money, stuff like that. The line in the TikTok video says, “Iran…where just having a British passport can get you detained.”
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You can probably get visas for those countries, but I think it's a lot of time in an embassy to get it solved.