Leandro Erlich

Why does these people stare at the swimming pool even some people fall into water? This is actually a space art work called "Swimming Pool" by an artist from Argentina named Leandro Erlich. 

He filled up water into two thick glass panels and creates water waves, so people may think it as water filled swimming pool - which used optical illusion. So if people go down to swimming pool, they may look that they're actually in the water. And here are some more of his works: 

*Image source: http://www.leandroerlich.com.ar/