Next to Aspous Beach is Achilli Bay, where the hero Achilles stepped on the boat towards the Trojan War. Again there is a sandy beach, but there is a large marina built here which destroyed much of the charm of the beach. Currently there are mainly fishing boats (when we were there in May 2018 there were only a few). A large part of the enclosed circular bay is now occupied by the marina and an enormous parking lot that nobody seems to use). From the beach you can see Aspous in the distance and the castle of the Chora that lies on the top of the rock. It is a quiet beach with little waves and there are no umbrellas or sunbeds for hire. This beach next to the parking lot is not very inviting to go for a swim, also because it is not really clean. You have better options for swimming in the sea at Skyros island. Achilli beach is about 150 meters long and is situated on the east side of the harbour. On the nearby small beach that stands at the end of a path that leads from Achilli to the north, stands the pretty chapel of Agios Nikolaos.
On top of a hill next to the parking stands what looks like the ruin of an old fortress but I am not sure what it is (more likely it is the remains of a shepherd fold, just like the ones you find in Katounes).