Final answer:
Easements running with the land are not subject to real property ownership rights. Buildings, air space, and navigable rivers are subject to real property ownership rights.
Step-by-step explanation:
In real property ownership, all of the following are subject to ownership rights except for easements running with the land. Easements are rights to use the property of another for particular purposes, and they are not considered as part of the real property ownership bundle of rights. The other options listed, such as buildings located on the land, air space above the land, and navigable rivers running through the land, are all subject to real property ownership rights.