Photo credits and license
- Viator product operator · Viator Partner API terms · Source and license details · No changes recorded by Needio.
Union Square
San Francisco Secret Scavenger Hunt & Riddle Race
tours
San Francisco Secret Scavenger Hunt & Riddle Race
tours · Union Square
A smartphone-guided riddle race that turns downtown SF's architectural landmarks into an open-air escape room, unlocking clues only when you stand in front of each micro-monument.
What to try: Smartphone-guided architectural puzzle challenges
~$15 per person · 120 min · Self-paced — see Viator listing
🟢 Open per demo data.
Hours shown here are demo data — not a real schedule. Confirm with the business.
🔒 Secured and fulfilled directly by Viator. Cancellation terms are shown on their page before you pay.
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Why Needio chose this
AI interpretation- InferredYou prefer hidden gems over landmarks, and this one is flagged low-profile in the data Needio holds.
Curated set — these San Francisco places are verified by Needio, with hours and availability to confirm at the venue. Sections marked “Live via Google Places” use live business data. Needio never makes a booking or confirms a reservation.