Complex sentence: Places such as Isla de Plata, Playa Conoma, Isla Arapo and Playa Arapito, are known for their great beauty although infamous to locals for the immense amount of pollution they harbor.
Split into simpler sentences: Places such as Isla de Plata, Playa Conoma, Isla Arapo and Playa Arapito, are known for their great beauty. These locations are unfortunately disliked by the locals for the immense amount of pollution they harbor.