The Metropolitan Museum of Art in New York City is the largest art museum in the USA. It contains art from every time and place. It is part of Central Park. How long will its masterpieces last?
20 years after people: Several paintings and artifacts are now damaged, due to birds and rodents entering through broken glass. The park side location will not be so marvelous anymore, as a strong wind knocks over trees, opening big holes in the building. The storm also blows off the rooftop garden/cafe. Nearby Cleopatra's Needle almost collapses.
25 years after people: The inside is now unrecognizable, due to plants and animals living in the museum. Temples, vases, and paintings are now homes of wildlife. The roof collapses, and only the walls remain.The building is indistinguishable from the rest of the park to something looking from above.
140 years after people; Another storm comes, and the nearby Jacqueline Kennedy Onassis reservoir (which has been changing shape) floods the museum. One of the walls is knocked down. All recognizable paintings are damaged. Soon after, a few trees inside the museum are knocked down due to either the storm, termites or Asian longhorned beetles, destroying the other walls.