What is the term for a piece of land that is not accessible by any public means?

The term for a piece of land that is not accessible by any public means is "Landlocked." This designation specifically refers to a parcel of land that lacks any direct access to transportation routes, such as roads, highways, or waterways. When a property is landlocked, it is completely surrounded by other land, which may limit the owner's ability to reach it without traversing neighboring properties.

This characteristic can pose significant challenges for landowners in terms of usability and development, as lacking an access route can restrict both legal and physical entry. Landlocked properties often require legal arrangements for access, such as easements, with neighboring landowners.

While the other terms may describe land with specific characteristics or uses, they do not inherently imply the absence of public access. For example, "Private property" also refers to land owned by an individual or entity but does not specifically denote lack of access points. "Secluded land" might convey privacy or remoteness but could still be accessible. "Enclosed estate" suggests a property that might have surrounding fencing or boundaries but may not be landlocked if it has established access routes.