Anywhere you drive in the Mount Rushmore State is bound to be bursting with beautiful scenery, but driving down this one highway in Custer lets you experience our state in a whole new light. Surrounded by rock formations, you’ll be engulfed in gorgeous landscapes, but if you’re claustrophobic, you might want to prepare for this one tunnel. This natural wonder might be intimidating to some, but it’s so worth seeing.

Have you driven through South Dakota’s narrowest tunnel? What did you think? Let us know in the comments!

This is one of the top road trip destinations in the state. If you can’t decide where to go next, try one of these South Dakota road trips we planned for you.

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