Did Ancient Humans Use Echolocation?
Archaeologists test how our ancestors may have used this (nearly) lost skill to navigate caves and other dark spaces.
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Article
Did Ancient Humans Use Echolocation? - Atlas Obscura
Video
Scientists and engineers constructed a tunnel underneath the leaning tower of Pisa.
Video
(16) Famous Monuments That Are Hiding Little-Known Secrets - YouTube
Tunnel construction underneath the Pisa tower begins at 17:00 of the video posted in the previous post located above as well as in the next video here however I do recommend everyone to watch the whole video.
Video
Famous Monuments That Are Hiding Little-Known Secrets - YouTube
Four other tilting towers can be found in Bologna, Caorle, Burano and Rome. The most famous of all leaning towers is, undoubtedly, the Campanile or Bell Tower of Pisa, located in Piazza dei Miracoli.
10 Leaning Towers of Italy (not just in Pisa)
While the Leaning Tower of Pisa is certainly the most famous tilting tower of Italy (if not world-wide), it is not the only Italian tower that was either intentionally or unintentionally constructed to not stand perpendicular to the ground.
Article
10 Leaning Towers of Italy (not just in Pisa) (yourguidetoitaly.com)
Wikipedia
List of leaning towers - Wikipedia
Video
(16) Impossible Stone-Cut Ruins Found Worldwide? 🌎👷 - YouTube
