Tunnel Rock, Sequoia National Park, USA/Depositphotos.com This beautiful passageway in Sequoia National Park is known as Tunnel Rock. This naturally occurring granite boulder was incorporated into the road construction beneath it. I'm so glad that it wasn't removed, and instead has become a beloved landmark. The rock is part of the ancient Sierra Nevada batholith, a massive granite formation created roughly 100 million years ago when molten rock slowly cooled deep underground. Erosion over millions of years exposed these formations at the surface, leaving behind the dramatic boulder landscapes throughout the region. This particular boulder ended up straddling the path of the future Generals Highway — and the people building that road made the right call. From History Cool Kids : "When the Generals Highway was being built in the early 1930s, Civilian Conservation Corps workers chose to route the road through the natural opening beneath Tunnel Rock rather than blast it away.…