Hill State Park. A second habitat next to it is designed to resemble a backyard in order to illustrate and provide solutions for human-wildlife conflict. The second habitat is home to two rescued leucistic raccoons. Harmony Hill opened in 2019, making use of the former polar bear exhibit which opened as part of Northern Shores in 1987. Northern Shores This exhibit opened in 1987 and has continued to be a spacious and engaging home for California sea lions. Multiple pools, islands for sun bathing, underwater viewing windows and demonstrations provide guests with many opportunities to connect with the residents. Pachyderm Habitat Opened in 1959, the Pachyderm Habitat is currently home to Black rhinoceros and river hippopotamus. The Asian elephants and Malayan tapirs were moved to Toyota Elephant Passage prior to its opening in June 2012. As of summer 2015, the Pachyderm Habitat is also home to a special area for children called the Be a Zookeeper Zone where they can learn how to be a zookeeper or meet small animals from the education collection. Two llamas named Jorge and Fernando came to the zoo for the new area. Bear Mountain This historic exhibit, on the National Register of Historic Places and originally opened in 1918, is one of the first natural-style zoo exhibits in North America and the first to use simulated concrete rocks. It underwent a $250,000 restoration between 1987 and 1989. After Bear Mountain's grizzly bears were moved to a newer exhibit, it has become home to smaller species like cinereous vultures and a North American porcupine. Stingray Cove Stingray Cove is a seasonal, interactive exhibit featuring an 18,000 gallon shaded open-air aquarium housing cownose rays, white-spotted and brown-banded bamboo sharks, southern stingrays, shovelnose guitarfish and bonnethead sharks. Guests are able to gently touch, feel, and feed the rays as they swim around the tank. Admission to the exhibit (which includes one piece of food for feeding to the rays) costs $5 in addition to zoo entry. The exhibit opened in June 2020. Traveling Exhibits Denver Zoo has hosted several traveling exhibits in recent years to raise awareness for conservation efforts. Traveling exhibits brought to the zoo have included "Nature Connects, Art With Lego® Bricks," "Washed Ashore, Art to Save the Sea" and "Dinos! Live at Denver Zoo." Other facilities The Conservation Carousel features hand-carved wooden replicas of some of Denver's most popular residents including a polar bear