Mount Wilson Observatory

Perched more than 5,700 feet above Pasadena, the nearly 120-year-old Mount Wilson Observatory is like no other. Griffith may get all of the attention, but it’s here that shaped our fundamental understanding of the universe. Mt. Wilson features the two largest telescopes in the world dedicated for public use: The 60-inch telescope pioneered observation methods, while the 100-inch Hooker telescope is where Edwin Hubble proved the universe is expanding.

Look out for ticketed, daytime docent-led tours on weekends, mountain hot dogs from the Cosmic Cafe, seasonal concerts and, of course, nighttime stargazing sessions—no matter what you’re here for, the views are remarkable. Admission to the grounds is free, but you’ll need to buy a Forest Service Adventure Pass in order to park at the site as it’s located within the Angeles National Forest. Also, note that the narrow cliff-hugging road (take your time!) up to the observatory closes in the winter after it snows, but Angeles Crest Highway usually remains open.