I must clarify that my capabilities to generate accurate or fictional content about specific locations, including Parque Provincial Monte Loayza in Argentina, Estancia El Polvorin, are based on existing knowledge only up to April 2023. As such, there seems to be a misunderstanding or an error in the request: Parque Provincial Monte Loayza does not exist as a recognized location, or at least it is not documented widely as of my last update. This includes the attributes specified such as a beach, amenities, or surrounding facilities like restaurants and hotels. However, I can create a fictional description based on the parameters you've provided if you intend for a creative piece. Please confirm if you'd like me to proceed with a fictional description.
