How it works: Purchase a 4-tour passport and we'll mail you this handsome passport booklet to use as a gift certificate for a friend or yourself! We will also email you a Passport Code Number which allows the passport holder to make pre-paid reservations for any SF Neon walking tour in 2018. Enter passport code number as a discount code at checkout for individual tours. Or email us directly to schedule your tours: [email protected] Any combination of 4 tours is possible: 1 person for 4 tours, 2 people for 2 tours, etc. Passports will be officially signed as each tour is completed. Many neon fans like to go on all 4 tours!