Tianmen Mountain in is a very popular tourist attraction because of the Glass sky walk, located 4,690 feet above the sea level on the side of the Tianmen Mountain in Zhangjiajie province of China. Walking on this see-through glass is a terrifying and thrilling experience, but definitely not for the faint hearted. If you are afraid of the heights, just don't look down while walking on that Glass.
Onaruto Bridge connecting Kobe and Naruto, Tokushima, Japan. The bridge is one of the largest bridges in the world and is also known for the Naruto whirlpools. The Naruto whirlpools are caused by tidal currents between the Seto Inland Sea and the Pacific Ocean. (Wikipedia)