These documentaries blend anime with live‑action footage to investigate a wide range of mysteries and historical topics. They cover subjects such as the statues of Easter Island, the search for a lost continent, the Bermuda Triangle, the NAZCA Lines, the Sphinx and the pyramids, the Greenwich Meridian, the Leaning Tower of Pisa, and the Great Buddha of Nara. The series often feels indecisive, oscillating between history, geography, travelogue, and the titular “mysteries.”