Usually the government owns public land.
Who owns the land in the ejidos system
the seashore is in public/state ownership, but "access" to the seashore may be through private land
The owner of the land owns the house.
Whoever owns the land that they are on.
Some of the land is public, most of the land is privately owned by many different people, a Park Authority is charged with the responsibility for controling development and conservation.
The land lord
who owns a large part of cuba's land and a large business
the state owns the land below the high water mark
the public
A public limited company is owned by its shareholders
Maine owns more land
Find out what county the property is in and look up land records/property records for that county via a GOOGLE search.