Verulamium Park
This 100-acre patch of greenery in St Albans offers something for everyone, according to Lulu. 'There is a lake with assorted water birds, including herons (the RSPB is often on hand with telescopes so you can have a better look), Roman ruins to walk around and a lovely view of the abbey.'
DetailsThe park is between Blue House Hill and St Stephen's Hill in St Albans (http://ind.pn/keJuv8)