Tucked away from the main areas of the city, San Francisco's Seward Street Slides are a bit of hidden gem. Built in the 1960s by a local teenager for neighborhood kids, the two parallel slides are formed in concrete running down one of San Francisco's famous hills. The community garden and mini-park was up for redevelopment when locals protested the change. A 14-year-old girl designed the slides in a competition, and the space was officially converted into a park in 1973.
Some bring their own cardboard for the ride, but others find discarded pieces next to the slides that make the journey down a bit smoother. From the top of the slides, be sure to pause and enjoy the views of the city and the bay. A sign reads "no adults unless accompanied by children" to mark the park’s original intent.