Introduction to Cabot Tower: Cabot Tower is the landmark building of Signal Hill. In December 1901, Marconi used his transmitting system to prove that radio waves are not affected by the curvature of the earth's surface. It was the first For the first time, radio waves crossed the Atlantic Ocean between Porthugh, Cornwall, and St. John's, Newfoundland, a distance of 2,100 miles (3,381 km). This was the receiving point for the first transatlantic wireless telegraph experiment. Now the first floor of the tower is a souvenir shopping area, the second floor is an introduction and exhibition area, and there is an autograph book on the table at the entrance of the stairs, which is full of signatures and testimonials from tourists from all over the world. The third floor is an indoor observatory. , there is also an open-air sightseeing platform.