Well worth a visit - only half an hour but breathtaking. Also lovely and cool on a hot day. To see such workmanship achieved hundreds of years ago for storing water - fascinating. We went just after lunch when we noticed the queue had gone down

Very unique attraction and totally unexpected just came upon it as we wandered around Istanbul and discovered this little gem. From the outside you wouldn't expect the vast and beautiful interior you come to behold inside. Truly grand and with interesting historical and mythical information. look out for the Medusa heads!! Doesn't take too long and is really worth seeing!

In this huge former water basin, there are fish swimming proving water quality, at the end you find medusas head engraved in stone. There are souvenirs and refreshments shown. Try to be there early unless the crowds will shove you through the path. Don't get annoyed outside by burglar like postcards sales boys and grown up carpet scouts - YOK... More

Visit before the week-ends as it is far more crowded then. Amazing what the |Romans achieved. Mainly for adults, children will be bored but it does not take long to wander through.

Must see to understand how a walled city of antiquity supplied the thousands of citizens with fresh water..Ingenius!

A great place to spend time try to plan your visit during the hottest part of the day it’s refreshingly cool.

It was beautiful in there. Earie music was played, it was dark and the red lights all made a great visit

Relatively short lines, affordable (10 lira/person) and a great way to get out of the noonday heat. Of course, the cisterns themselves were quite interesting, the highlights being the medusa columns. Slightly slippery floors with water dripping from the ceiling. Tip: Don't wear high heels or white clothes.

It is an Awesome experience to be inside. I did not expect much when we came in, I went out awed and inquisitive.