If you want to do this walk, you can start from the Plakias Bay hotel.
Start here: https://maps.app.goo.gl/Hnb9kp36rkLtmuqC9
From there go up and take the small footpath straight ahead along the hotel fence. Take the the first trail on your right and keep following the path untill you arrive at the caves/tunnels.
The walk passes a steef cliff, used as a climbing wall. The views over Plakias bay are very beautiful along the whole walk. Enjoy sunset at this place and you won't be dissapointed.
To get to the caves you past a short tunnel so don't forget to bring your flash light.