Whenever I see footage like this, I'm always struck by how small the trees were. The Rivers of America and the Jungle Cruise look almost barren compared to today.
On a side note, my brain got distracted by the title of the thread (1956) combined with the song in the second video (1979). "Wrong year!" "Wait, is there a song called 1956?"
Anyway, thanks for posting these! They're fabulous!