The castle was built on top of a natural grassy mound.
这座城堡建在一个天然的绿草如茵的小丘上。
《牛津词典》
2
This summer I want to take my son on the funicular railway which runs up the mountain to the top of the castle gardens.
这个夏天我想带我儿子乘坐缆车到山顶上的城堡花园去玩。
3
Top of your list should be the castle and grounds of Chaumont-sur-Loire, near Blois, which hosts a magnificent garden festival from spring to late autumn.