• The old radar tower on top of Mount Umunhum in San Jose, CA
    Hikes & Outdoor Activities,  Local Discoveries

    Mount Umunhum & The Tower of Doom, San Jose, CA

    What is that ominous-looking cube on the mountain in South San Jose? Perched atop Mount Umunhum (pronounced: oom-un-hum), a mysterious concrete cube stands watch, overlooking Silicon Valley. If you’ve ever wondered about the “Tower of Doom” as we’ve been lovingly calling it, you’re not alone. Locals also refer to it as “the Cube” or “the Box”. But whatever you want to call it, we were determined to see what it was! After a little snooping around, we found the road that leads to the site, so we hopped in the car and ventured to the summit of Mount Umunhum to uncover its mysterious secret. What to see once you’re on…