Riva (also called Çayağzı) is a neighbourhood in the municipality and district of Beykoz, Istanbul Province, Turkey.

[2] This place is the filming location of the Turkish TV show hit called Diriliş: Ertuğrul and its sequel Kuruluş: Osman.

It is a coastal village in the Anatolian part of Greater Istanbul, situated between Anadolu Feneri and Şile.

The headquarters of the Turkish Football Federation (TFF) is located in Riva.

This geographical article about a location in Istanbul Province, Turkey is a stub.