Thunder Hole, a booming sea cavern, is at the entrance to Bar Harbor's Acadia National Park, scene of rest and recreation for thousands of summer tourists and of year-round scientific research to benefit mankind.

Digital Commonwealth — Boston Public Library

Shoes for Earthquake Victims. This open-air shop at Compton, Calif., operated by the Inglewood Auxiliary of the American Legion, provided free shoes for earthquake victims. The photograph shows business booming March 14 as needy victims helped themselves.

Associated Press

Thunder Hole, a booming sea cavern, is at the entrance to Bar Harbor's Acadia National Park, scene of rest and recreation for thousands of summer tourists and of year-round scientific research to benefit mankind.

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