In Drepano, Argolis: small chapel of Agios Nikolaos and small castle
See drone footage of the two inaccessible landmarks on Kondyli beach in the Vivari settlement in Drepano, Argolis located on both sides of the entrance to the bay.

Agios Nikolaos
On one side stands the solitary chapel of Agios Nikolaos accessible only by boat.

On the other side an enigmatic small castle that visitors most likely do not even notice. I took several photos from various angles to reveal more details.
It was built by the Venetians in the early 18th century to guard the shipyard that was in the back of the bay. Although the terrain is very remote and difficult to access it has an excellent design with two walls one on the sea and the other on land. The one on the sea has ramparts suitable for cannons. Above is a strange square building with a pyramidal roof that probably served as a watchtower. The sea wall has a platform with two large square holes as seen in the photos. At the top of the castle there is another battle position.






The area is located near Nafplio and is known for Kondyli beach and Vivari which has nice fish taverns.