Could you tell me in what city the Castle in the Sea is located? What kind of stones was the castle built with?

Merhaba!

I am no expert on Turkey...but I searched on the internet for you and I hope this link will help you, my friend!

http://www.turkeytravelplanner.com/WhereToGo/Mediterranean/Silifke/Kizkalesi.html

Good luck!

/Aslan

Thank you......my son brought me some stones from his travel there and I am curious as to what kind they are.

i might not be any help, but there is a castle in the sea in Kusadasi might not be the one your talking about though.