As far as I know, many of these mansions are unoccupied.
I went there when I was a kid,
I remember one of the mansion on a tiny little island,
was built by a parvenu for his beloved wife who died
before it was completed, something like that...
what is the name of that isle 那個島是叫什么來着？

”湖中最有名气的岛屿叫心岛，岛上有一座古城堡式的建筑，古堡的名字叫博尔特。导游告诉我们，1900年，纽约旅业大王乔治·博尔特买下这个岛屿，并投资2500万美元，在此兴建这一罗宾兰德式古堡，作为献给他的爱妻露易斯的礼物。但不幸的是，城堡刚建好，还在装修中，露易斯竟于1904年病逝。锺情的博尔特悲痛不已，遂令停工，并决定从此不再续建，也不再踏足此岛。老博尔特死后，根据他的遗嘱，此岛交给了美国政府。如今对外开放，每人买一张2美元的门票就可进内参观。“

所裏，上面已經說暸，我沒看清楚。