这个地方是一块铺石子的三角地。

The place is a cobbled triangle.

我曾在我们家屋后走廊和葡萄藤之间的三角地举行过一次像模像样的展览，但不幸为雨所阻。

What resulted was an imposing display in the triangular nook between the back porch and the grapevine, but it got rained out.