There’s a whole other world lurking beneath the earth’s surface and it’s begging to be explored. A visit to the otherworldly gem known as Subway Cave is a great place to start. Tucked away just outside of Lassen Volcanic National Park, this unique cave system offers a rare glimpse at an impressive underground lava tube. It’s long, too, and there’s a .7-mile trail that leads you all the way through it. Take a look:

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Did you know about the Subway Cave trail? Have you explored any of NorCal’s caves recently? Let us know in the comments! We would love to hear about your underground adventures.

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