Question

Reading the paragraph.

We saw it from miles away, sitting atop the crest of a hill. The old walls were crumbling, but you could still see the outlines of the vast parapets and stone towers.

The author is most likely looking at 
an old house.
an old castle.
an old mansion.
an old building.

Answer 1

Hey there, the answer is going to be an old castle.

Hope this helped.

Answer 2

The author is looking at an old castle.