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Descend to its shaggy banks and follow the canal — bushy with cattails, busy with turtles and staked out here and there by unbothered herons — and you’ll find easy escape from Georgetown’s mobs of shoppers — as Stephen Hansen put it last year, it’s “neither a city park nor a playground; not a parcourse nor a gym.”

It is neither a city park nor a playground; not a parcourse nor a gym.

Another profitable brawnstorm, this one invented in Europe and developed in the U.S. by Peter Stocker, is called Parcourse.