Hi Evgeny,

Welcome to San Francisco! I have a few suggestions for you:

• Ferry Building This is an awesome place to sample local food and see the Bay Bridge (it even lights up in the form of an art show at night!). Walking along the Embarcadero (Justin Herman Plaza) is really nice, but can be crowded if there's a San Francisco Giants game as Willie Mays Plaza is nearby.
  
  
• Crissy Field is a beautiful place that locals love. It will give you awesome views of the Bay, Golden Gate Bridgeand Alcatraz. The popular Ghiradelli Square isn't too far away if you walk along Marina Blvd and through Fort Mason.
  
  
• Lands End and the Sutro Baths are beautiful spots to catch a sunrise and sunset, and lend themselves to exercise and exploration. Don't miss the Eagle Point Labyrinth. These spots are also next to Ocean Beach and the well-known Cliff House. If you can't get seating inside the Cliff House full-service restaurant, consider sitting inside the small room on the right upon entry; you can still order apps, desserts and drinks from here. ;)
  
  
• The Tiled Steps Project (at 16th and Moraga) is beautiful to see in person! The park nearby, Grand View Park, will give you some of the city's prettiest views. Other insanely beautiful city scapes can be captured from Twin Peaks and Billy Goat Hill Park.
  
  
• Palace of Fine Arts, Presidio and Lyon Street Steps are all super close together and fun to check out. "Billionaires Row", the streets at the top of the Lyon Street Steps, are home to some of San Francisco's wealthiest & most successful residents. The Presidio also hosts a picnic-esque gathering with food trucks on Sunday called "Off the Grid". This is really fun on a nice day, and attracts lots of locals.
  
  
• Golden Gate Park is beautiful and you can spend a whole day here! Don't miss the California Academy of Sciences, Japanese Tea Garden, De Young Museum and Dutch Windmill.
  
  
• The Castro Theatre is a unique SF experience, as they have shows and singalongs. The Castro district is fun to explore, with bright rainbow sidewalks and views. If you end up here, check out the Seward Mini Park - it's fun!
  
  
• The Mission District is a culturally diverse place to experience the city. Pick up some snacks at Bi-Rite Market or the Bi-Rite Creamery and head over to Dolores Park to soak up the sun. Exploring Valencia St bars and shops on foot is also an awesome way to spend time in San Francisco.
  
  

I compiled a few more faves (incl. restaurants and shops) here. Feel free to leave me a comment if you have questions! Highly suggest downloading Lyft or Uber to get around if you don't have a car. The Muni bus is generally accessible if you don't mind public transit. :)

I don't think anything beats getting on a bike and hitting up Golden Gate Park early in the day before you lose the sun. Bring some food and a blanket and just chill.  It's such a big park it's great to ride around in and see everything.

Biking along the water from Golden Gate Bridge to the ferry building is a great (and easier) ride. It's a flat bike path and a nice way to spend the day outside.

If you're looking for some bar & food hopping then head over to Valencia & 16th street for a great time.