I was surprised to find hardly anyone there. 中there充当的成分分析

I was surprised to find hardly anyone there. 中there充当的成分分析
“there”
是地点状语
还是
动词find的宾语hardly anyone的补足语?
除了告诉我答案,也请分析下为什么,谢谢
上下文是这样的：
Dear Editor,
I visited our zoo yesterday and I was very surprised to find hardly anyone there. Zoos are very important places. They are like living textbooks for young people. ...