get a look at the elephant 见世面；开眼界；经世故

【例句】
Seeing many things in China that he had never seen before, William got a look at the elephant.
在中国见到许多从未见过的事物，威廉大开眼界。

The boy came and got a look at the elephant in the city.
男孩到城里来大开了眼界。