Through the transparent glass, you can see the toilet and sink inside the bathroom. 

It's pretty, but it's a bathroom, but I wonder if it's okay...

However, when someone enters and locks the door, the glass quickly becomes opaque. 
This is a park toilet in downtown Tokyo, Japan. 

Transparent toilets were installed in two places, Yoyogi Fukamachi Small Park and Harunogawa Community Park in Shibuya-ku, Tokyo, according to CNN.

The facility is said to be part of the'Tokyo Toilet Project' planned by the Japan Foundation, a public interest foundation, to improve public toilet awareness.

It is said that Van Shigeru, a Japanese architect who was awarded the Pritzker Prize, was in charge of the design.
Shigeru explained on the project website, "When entering public toilets, especially toilets in parks, people think of both cleanliness and whether there are other people inside."

"People can see how clean the bathroom is outside and whether there are other users," he added, thanks to the opaque exterior walls only when someone uses the bathroom.

This is'News Pick'. 

(Photo = CNN website)