Time Out says
High up in the San Gabriel Mountains, the Mount Wilson Observatory affords terrific views of the surrounding region. If you're traveling with a group, you can book an after-dark session on the observatory's 60-inch telescope. Admission is free, but you'll need to buy a Forest Service Adventure Pass in order to visit the site as it's located within the Angeles National Forest; see the website for full details.
Mount Wilson Rd
|Price:||free. Parking free.|
|Opening hours:||Apr-Nov 10am-5pm daily, weather permitting.|
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