Location info thanks to theschnauzers
here's the episode 6 description in TV Guide:
Title find thanks to supah3ro!!
TEAMS ENDURE A STEAMY DETOUR IN ISTANBUL TO KEEP THEIR RACE FROM GETTING SCRUBBED, ON THE AMAZING RACE, SUNDAY, NOV. 4
CHEAT TWEET: After 2 sweaty legs in Bangladesh, Teams strip down 4 a Turkish deep body scrub on #AmazingRace, 11/4 830pmET / 8pmPT http://bit.ly/TiTBuW
Get Your Sexy On Teams endure a steamy detour in Istanbul to keep their race from getting scrubbed. Meanwhile, after finishing last on the previous leg, Josh and Brent must overcome a tasty Speed Bump in order to keep their hopes of racing alive, on THE AMAZING RACE, Sunday, Nov. 4 (8:30-9:30 PM, ET / 7:30-8:30 PM, CT / 8:00-9:00 PM, PT) on the CBS Television Network.