SS United States: The mighty ship that broke all the records -- then was left to rust
https://edition.cnn.com/travel/article/ss-united-states/index.html
It's important to preserve historic architectures. But, it must be maintained so as not to cause a dangerous situation.
If it's extremely rusted, the ship can collapse. Collapsing ship can damage people and facilities around the ship.
So, local government should take
measures for preventing such a situation.