Floyd Bennet Field was NYC’s first municipal airport until LaGuardia airport became the domestic flight hub. It was then sold to the U.S. Navy in 1941, until the war’s end, when it became a Naval Air Station.
Since 1974 it’s had park status, with the original airport hangars reclaimed nature with grass and other foliage growing inside.
Johannisthal Air Field in Berlin, Germany
Opened in 1909, the Johannisthal Air Field was one of the first motor airfields. Beset with several tragic accidents and, most notably, world wars, causing demolitions or closures, and changing hands after World War II.
It is now a park, though not necessarily in the traditional sense. Finding the entrance requires a sense of adventure and possibly some sneaking around. But brave explorers are rewarded with stunning visuals, ruins interspersed with growing trees.
Dunmore Park in Airth, Scotland
Dunmore Park is the estate of the earls of Dunmore and is most well known for its pineapple sculpture which acts as a focal point.
After the death of the original owners and parts of the estate sold to different people, there were plans to demolish part of the house, which never came to fruition. Today, the estate remains as ruins that attract tourists and can be rented via the Landmark Trust company.