Cambridge Woods Park

East Side tunnel to nowhere

Built more than a century ago, this stone tunnel portal in the east bluff of the Milwaukee River is near the intersection of North Cambridge Avenue and Hampshire Street. Partly filled in and heavily vandalized, it remains impressive — and mysterious. Carl A. Swanson photo

There is a mystery in Cambridge Woods Park on the east bank of the Milwaukee River — an ancient tunnel made from carefully cut and fitted stone blocks and large enough to drive a truck through.

From its portal in a bluff at the foot of Hampshire Street, the tunnel extends eastward under the Oak Leaf Trail only to end abruptly at a modern concrete wall about 60 feet inside the entrance.

Who built it? And for what purpose?  (more…)

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