Watching lots on ancient civilizations, from the tip of South Africa. Hidden South American ones(pre Inca + Ecuador caves), plus all the Central American ones(pre Aztec- near Belize/Yucatan Peninsula ) with the American Native Indians descending from within the earth.
possible global pyramids.....
Then some on Atlantis, as it always interested me as a child. At the start of the internet I was always on google maps looking at the Azores. I always found it strange that there seemed to be roads or straight lines under the sea from the Bahamas(all around the Eastern Caribbean seas) to the Azores. Plus I noticed plenty of patterns which seem to be sunken cities. Still it is hard to get a conclusion from fact to was is just plain whack.