Him discovering South American gem locations? I can believe that. But, the Sea Spire? The desert pyramid? The desert pyramid is in AFRICA! The sea spire is (presumably) that structure where Russia used to be(or that one that's a slight distant away from America).
from beach city
and freakin' europe.
Now I know he probably used a boat (even though they never mentioned it or explained how he got food during his travels), but it's still an interesting trivia fact that he walked across the entire earth in his quest for exploration. It must've took years. That diary was probably with him for at least a decade.