The Col de Turini (el. 1607 m) is a high mountain pass in the Alps in the department of Alpes-Maritimes in France. It lies near Sospel, between the communes of Moulinet and La Bollène-Vésubie in the Arrondissement of Nice. It is famous for a stage of the Monte Carlo Rally which is held on the tight road with its many hairpin turns.

Photograph by it’s iceberg, baby! on Flickr
The Col de Turini has also featured three times in the Tour de France (1948, 1950 and 1975) averaging 7.2% over 15.3 km when approached from the East starting at the valley of the river Vésubie.
10. Guoliang Tunnel Road, China
The Guoliang Tunnel is carved along the side of and through a mountain in China. The tunnel is located in the Taihang Mountains which are situated in the Henan Province of China. If you want to get there, you should start your trip in Xinxiang. Leave the city by driving north on Huanyu Avenue (the S229). After 13 miles you’ll enter the town of Huixian.

Photograph via Blog-O-Rama
Stay on the S229 for 15 miles more until you reach the junction with the S228. Turn left here and keep following the S229. After 8 miles you reach the village of Nanzhaizen. Turn left again and follow directions to Guoliang, 8 miles further.