Irby Hall

Irby Hall, on the site of an ancient manor house of Chester Abbey, is early 17th century, with some reconstruction in 1888.

A high earth bank - just visible to the left - and the remains of a deep moat are reminders of times when marauding Welshmen were slightly more of a problem than they are today. Recent excavations nearby in Irby have uncovered the remains of a settlement dating from Iron Age and Roman times.
(Information from - http://www.allertonoak.com/merseySights/WirralTI.html )

There are stories of an underground tunnel leading to Thurstaston so as the early occupants could escape via the River Dee should there be a need.