River Ridge at Keystone Apartments, Indianapolis, IN, 46240. Bedrooms: 1-2. River Ridge at Keystone Apartment Homes reaches new heights in luxury, convenience, and service. Along with a rare blend of distinctive architecture and superb location, we offer a variety of unique floor plans and amenities that have been carefully orchestrated to satisfy your every need. This beautiful community has exceptional one and two bedroom apartments with thoughtful design details, and an exciting array of neighborhood amenities including a precision fitness center, a swimming pool with a sun deck, and much more. Conveniently located near prime dining, shopping, and entertainment venues, River Ridge Apartment Homes is apartment living that lets you escape from the world.