In 2014 it acquired Iron Tree by Ai Weiwei and opened an 8 - acre , $22 million Japanese Garden .
It is Michigan 's second - largest tourist attraction and is a feature venue in ArtPrize , the largest art competition decided by public vote .
In 2014 tourist attraction acquired Iron Tree by Ai Weiwei and opened an 8 - acre , $22 million Japanese Garden .
It is Michigan 's second - largest tourist attraction and is a feature venue in ArtPrize , the largest art competition decided by public vote .