The sea level portion of this cave and the sea cliff rocks just outside the cave have become, over the centuries, the only known mainland rookery and hauling area (wintering home) of the Steller's sea lion and --to a lesser extent-- the California sea lion.[from wikipedia]

The cave system is at sea level and the ocean continually washes into the main cavern which has a floor area of about 2 acres (0.81 ha) and a vaulted rock dome about 125 feet (38 m) high. Southward from the main chamber, a low passage runs 1,000 feet (300 m) to a sea level opening. This corridor is flooded at high tide and free of water at low tide. [from wikipedia]

A gift shop or Souvenir gift shop is a store primarily selling souvenirs relating to a particular topic or theme. The items sold often include coffee mugs, stuffed animals, t-shirts, postcards, handmade collections and other souvenirs. [from wikipedia]

Signs are any kind of visual graphics created to display information to a particular audience. This is typically manifested in the form of wayfinding information in places such as streets or on the inside and outside of buildings. [from wikipedia]

A 1,500-foot (460 meter) long trail was excavated by hand into the face of the cliff. At the bottom, a 135 step wooden tower was extended down to the north entrance of the caves. Despite the difficulty and danger of the construction, the trail and stairs provided safe access for visitors and the Sea Lion Caves opened to the public in August 1932. [from wikipedia]

In American English, walkway is a composite or umbrella term for all engineered surfaces or structures which support the use of trails. The New Oxford American Dictionary also defines a walkway as "a passage or path for walking along, esp. a raised passageway connecting different sections of a building or a wide path in a park or garden." [from wikipedia]