Images from archive... Since these image were taken in China, I decided to post here...
It was summertime in 2013 when I was in Shanghai for the conference and I had a chance to walk around downtown.
Bund sightseeing tunnel lies under the Huangpu river (黄浦江), connecting the Bund and Lujiazui area of Pudong district.
After paying 50 yuan, unmanned transparent compartments will take you to the bizarre world. It takes about 4 minutes to run 646 meter tunnel.
It's open from 8:00 to 22:30 (from May to October) or from 8:00 to 22:00 (from November to April).