There's a 17-kilometer-long highway that goes through a mountain, but not in a straight line - Apparently.
The Mount Evans Highway in Colorado, USA, is the highest paved road in North America, leading to the summit of Mount Evans. However, due to geology, the road zigzags through a series of switchbacks, effectively making it the longest "straight" highway in the world. The road's unique design was necessitated by the steep terrain, and it has been in use since 1939. This unusual highway has become a popular tourist attraction and a challenge for drivers.