Wild sea lions have flocked to Pier 39 since the 1989 earthquake and the population has grown ever since. Every winter the number increases to almost 900, thanks to the availability of space and ample food. Although some of the sea lions choose to migrate seasonally, usually some still keep Pier 39 as their regular haunt. You can bring your kids over for free educational talks by the Marine Mammal Center, held on weekends year-round provided the weather is good. See these wild adorable creatures up close and personal at this family friendly spot.

This piece of artwork in the Marina also plays music. The sea-powered organ is a set of pipes that run along the waterfront and extend into the waters of the bay. The organ was built by scientists from the San Francisco Exploratorium. Place your ear against one of the pipes and listen to the music created by the sound of the waves. It's a unique way to enjoy nature and this is, perhaps, one of the few places in the world that you can.

San Francisco Model Yacht Club is located in Golden Gate Park. Established in 1898, it is one of the oldest surviving clubs in the country. Check out these tiny boats as they glide across the water. The club features a clubhouse and the artificial lake Spreckels Lake, that supports motor and sail model boats. Visit this club for its boating events and regattas, as well as for a glimpse of its unrivaled model boat collection.

Situated along John F. Kennedy Drive and a part of the magnificent Golden Gate Park, the Bison Paddock is just like it's name suggests; it's a large enclosure of a herd of bison where visitors can come to admire these large animals. Buffalo have been in the park since 1892, since the city kept unique animals in Golden Gate Park before the city's zoo opened.

The Ingleside Terraces Sundial is one of the most unique spots to visit in San Francisco. This sundial was greeted by 1500 people when it was inaugurated on 10th October, 1913. The 28 foot monument is created out of marble and concrete. There are also many events hosted at the Ingleside Terraces park with the sundial taking the center. The attractive architecture sure invites many tourists as well as locals for its magnificent sight.

Sutro Baths was built in the late 19th Century. It was a large swimming pool owned privately by Adolp Sutro, who was a former mayor of San Francisco. It had seven different pools, one having fresh water and the others having salt water, but varying in temperatures. Below the Cliff House, a small beach inlet was filled almost hiding the vast iron, glass and concrete structure. The bath had a high operating cost, due to which it eventually closed and a fire in 1966 almost destroyed it leaving behind the ruins. The ruins of the Sutro Baths are open to the visitors as well as the cave where you can catch a glimpse of bats.