The Basilica Cistern is Istanbul's largest surviving Byzantine cistern and one of its most unique historic sites. Constructed in 532 for Justinian I, this sprawling underground water reservoir ...

Turkish authorities have sealed off a luxury spa run by a five-star Istanbul hotel that was set up by illegally modifying a 1 ...

"Our spa offers a Turkish Bath and a restored 1,500-year-old cistern," the hotel website says, showing photos of a tastefully-lit brick-lined underground pool with bubbling turquoise waters.