My Top Current Mysteries

Taiwan is an historical goldmine. There are more important historical locations and places that are more interesting to the general world population, but few have

My current mysteries I am trying to unravel are as follows (organized chronologically)

1. Did all Polynesians originate from Taiwan?
2. What happened to the negroid aborigines?
3. What are those "buildings" undersea off the coasts of Taiwan? Are they a lost civilation?
4. Is the "pyramid" on Yang Ming Shan mountain really an UFO landing site (as the aboriginals claim)? And how do you explain the rock carvings of "UFOs" the early Japanese colonizers write about?
5. What happened to the original aboriginal inhabitants of Taiwan? Were they massacred or assimulated?
6. Were the British the first Europeans to attempt to colonize Taiwan?
7. Where is the exact location of the first Spanish fort and mission on Taiwan?
8. The Dutch claim to have built seven forts on Taiwan. Only three are currently identified. Where are the others?
9. There are dozens of placenames in Taiwan that start with "red hair" (the name Chinese gave to the Dutch). Are these places actually founded by the Dutch?
10. Between the 15-17th centuries Spanish galleons traveling between Mexico and the Philippines passed by the east coast of Taiwan. One such ship spotted gold glittering on a sandbar and the sailors came ashore to investigate. They were slaughtered by the aborigines and their bodies dumped in a mass grave. Where is that grave?
11. Between 1730-1790 the Chinese built a 300 kilometer long earthen wall to separate the Chinese settlers for the head-hunting aborigines. The wall was up to 2 meters high and faced with a ditch. It has disappeared from Taiwanese knowledge but pieces of it survive. Can it be retraced across modern Taiwan?

These are the mysteries I am following. I try researching and traveling to possible sites. I try interviewing locals and piecing together myths and rumors. Hopefully over time I can make some headway on at least some of these fascinating stories from our past.