River Crossing at Keystone Apartments, Indianapolis, IN, 46240. Bedrooms: 1-3. River Crossing At Keystone Apartments where luxury and distinction are combined. Located in the heart of prestigious Keystone at the Crossing, you will discover the location is unbeatable. Minutes from Sax Fifth Avenue, Crate & Barrel, Pottery Barn and Champps, play hard...rest well. River Crossing At Keystone Apartments has set the expectation for luxury apartment living in Indianapolis.