Though the grounds are open daily, the observatory itself is open Friday through Sunday.
The vista from the Griffith Observatory is stunning, particularly at night when the whole of Los Angeles twinkles below you. Inside this hilltop landmark you’ll find a selection of exhibits, including a Foucault pendulum, Tesla coil and planetarium show. Give yourself plenty of time before the 10pm closing to line up and gaze through the 12-inch refracting telescope on the roof. Otherwise don’t worry: you can look through the far less crowded modern, reflecting telescope on the front lawn. Just a heads up that parking now costs between $8 and $10 per hour—though you can take a DASH bus up there for only 35 cents.