Deer Park (also known as Birsa Deer Park or Bhagwan Birsa Mrig Vihar), located at 9R85+J2R in Chordera near Kalamati on Ranchi-Khunti Road (about 16-20 km from Ranchi center), Jharkhand 835102, is a serene wildlife park set in a lush 54-acre sal forest, home to over 230 species of deer thriving in natural habitats. Open typically until 6:30 PM (morning entry around 9 AM; closed Mondays in some seasons), it offers jeep/bus safaris for close-up views of spotted deer, sambar, barking deer, and others amid giant sal trees, ber, neem, and shrubs; watchtowers for observation; a children's playground near the entrance; paved walkways; a canteen; and public utilities—no plastics allowed. Nominal entry fee (~₹20-50). Rated 3.9/5 from 79 Google reviews (Tripadvisor 3.9/31), it's lauded for family/kid appeal, natural beauty, serenity (3-4 hour visits, busier weekends), and upkeep by the Forest Department since 1987, though some note unhelpful staff. Ideal day trip for wildlife lovers; plastic ban enforced.