Explore details about location Ύδρας. Ύδρας is a location situated within the Δήμος Παλλήνης alongside other areas such as Δεβενακίων, Φειδιππίδου, Χίου. Additionally, some smaller parts of Ύδρας include specific areas like Pogoniou, Μακεδονίας, Periferiaki Odos Imittou adding to the diversity of its landscape.