SAN FRANCISCO (KPIX 5) — As part of what it calls a “musical adventure,” the organization PianFrancisco hid unexpected pianos under the Golden Gate Bridge so music could cut through Sunday’s thick fog.

A local pianist playing underneath the Golden Gate Bridge (CBS)

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Visitors were not only treated to the stunning view at Fort Point, but they heard classical music to complement the waves crashing in the background.

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PianFrancisco placed the pianos there for everyone to enjoy. Not all of the concerts were held by passersby, however; local musicians were also drafted to perform. Park rangers were also present to tell stories about Fort Point’s past.

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The event ended Sunday, but it won’t be the last. PianFrancisco has been sneakily placing pianos around the city–they placed some in the San Francisco Botanical Garden in July.