Pyramids at Guimar
Although not discovered by him, they were brought to the notice of the World by Norwegian Explorer and Anthropologist Thor Heyerdahl, at that time a resident on the Island, and due to his intervention the Archaeology Department of La Laguna University carried out excavations, and the site of the pyramids was purchased by the Fred. Olsen shipping company in order to protect and restore them.
At the time I made a video of our visit, and hope to post this later (when I have worked out how to transfer it to my computer).
More information about the Guimar Pyramids can be found at http://en.wikipedia.org/wiki/Pyramids_of_G%C3%BC%C3%ADmar