Located on the Pacific coast in Oregon, USA, the Sea Lion Caves are a connected series of caverns where the threatened Steller’s sea lions return each spring and summer to breed. It is the only known mainland rookery used by the species, which are the largest eared seals. The only bigger seals are the elephant seal and walrus. There is a series of walkways taking visitors to view the Sea Lion Caves. This area also serves as nesting grounds for the Tufted Puffin and Bald Eagle.