Hiltl, purportedly the world’s oldest vegetarian restaurant according to the Guinness World Records, has several locations in town. The best for combining people-watching and delicious food is its space above busy Bahnhofstrasse. Help yourself to the wide array of options at their hot and cold buffet, which features everything from fresh salads to Thai curries. Dishes are charged by weight. Then, enjoy your meal at the airy rooftop terrace, as you watch the crowds below go by.