One writer on ancient earthworks notes that it "looks like a respectable mountain and is in fact a natural island fortress".

I couldn't help but feel a nagging sense of trepidation: after all, the ancient earthwork was originally built to keep Welsh folk like me out.

The area is still delimited by the ancient defensive earthwork, which once must have stretched further south to the hill fort at Borgberget.

There are ancient earthworks near Heapey and Roman coins were discovered in 1835.

It is a condition marked by a desire to see and stand upon or amid ancient earthworks; one mound leads to another.

An ancient earthwork runs across the wood.

There is some evidence of the remains of ancient earthworks on Walton Hill.

The surrounding area has several large, ancient earthworks termed "geoglifos" by regional archaeologists.

Several archives contain his drawings of ancient earthworks.