In the heart of California, the Sequoia and Kings Canyon National Parks are home to some of the tallest trees on the planet.

To attract tourists to their road, private landowners would cut a picture-worthy tunnel through a living or dead sequoia.

Access to the Tunnel Log is included in park admission. For more information, visit the NPS website. Sequoia National Park Small Group Tour from Three Rivers (82 reviews) 5 Star Rated Winter ...

There's also the fun California Tunnel Tree, which is the only living sequoia in Yosemite that features a human-made tunnel carved out the middle of the trunk. Visitors can admire the towering ...