Day 1 — Arrival and first impressions: Union Square, Chinatown, Nob Hill
✈️ Arrive at SFO and transfer downtown: take BART from SFO station to Powell St/Union Square — ≈ 30–35 min nonstop; taxi/rideshare — 30–50 min depending on traffic. After check-in, stroll around Union Square: storefronts on Stockton/Geary, art installations, and classic hotels around the square. Slip through the Dragon’s Gate into Chinatown — fragrant markets and signs in Chinese characters instantly shift the mood. Toward sunset, climb the steep slope to Nob Hill: by the Gothic spires of Grace Cathedral and from the terrace in front of the Fairmont, you get those “primeval” views of the hills and the bay. In the evening — signature sourdough from a bakery or clam chowder in a bread bowl — the right culinary ritual to start.