The concept of the 'henge' was introduced by a man called Thomas Kendrick in 1932 and technically, a henge is a circular earthen bank with a ditch inside it and one or more entrances through the bank.

BBC: Discovering Britain��s prehistoric stone circles

As strong as it was, as close, it was as if sounding brass or a tinkling cymbal, across that ditch.

NPR: Excerpt: 'The Prince of Frogtown'

He stomped the accelerator and raced from ditch to ditch, his winch cable whining, yellow lights spinning, mommas crying, ambulances screaming away or, if it was a bad one, not screaming at all.

NPR: Excerpt: 'The Prince of Frogtown'