Beach sights can include a variety of different things, such as castles, terns, yachts, dunes, umbrellas, surfers, mesas, erns, TANS, cabanas, shells and stones, sunshine and sand, and surf and seagulls. Castles are large structures made of stone or brick, usually found in coastal areas. Terns are seabirds with long wings and forked tails. Yachts are large, luxurious boats used for recreational sailing. Dunes are mounds of sand formed by the wind. Umbrellas are used to provide shade from the sun. Surfers ride the waves on surfboards. Mesas are flat-topped hills or mountains. Ern is a type of seabird related to the tern. TANS are a type of skin color acquired from exposure to the sun. Cabanas are small, open-sided shelters used for shade. Shells and stones are often found on beaches. Sunshine and sand are two of the most common beach sights. Surf and seagulls are also common sights at the beach.