Museum of the Sea
The Castello di Milazzo is home to this museum founded by Sicilian marine biologist Carmelo Isgro who recovered the remains of a sperm whale that died after it was caught in an illegal fishing net off the Aeolian Islands. Isgro reconstructed the whale's skeleton, and it became the central figure of the museum along with other exhibits that highlight the relationship between man and the sea and how it can be improved. While the museum is free, you still have to book your ticket online at least 24 hours in advance.