Encore At at The Wynn 3121 S Las Vegas Blvd, Las Vegas, NV 89109. Encore at the Wynn, is a luxurious resort and casino known for its sophisticated design, world-class amenities, and top-tier service. Opened in December 2008, Encore is the sister property to the Wynn Las Vegas and is situated on the Las Vegas Strip, offering guests an opulent retreat in the heart of the city's vibrant entertainment district.