Charlie West

Really good exhibition including long boats, models of ships, guns, swords, paintings and even diving helmets. The price of admission was 200tl.
My only issue is if you have a camera they will ask you to pay 120tl to use it. Taking photos on your phone is free.
There are toilets, a café and they speak English.
The staff are very welcoming.
Easily found, massive sign on the building.
Highly recommended going on a boat tour after (they depart from right next to it)

Very cool place to enter the grand bazar from, shops all around, not just in the bazar. Get lost, it's part of the fun!