1116-47834 - The Giant's Causeway is an area of about 40,000 interlocking basalt columns, the result of an ancient volcanic fissure eruption, Northern Ireland, Bushmills, Ireland
190-3667 - Cooking stove in interior of a Navajo dwelling in which three interlocking pinuon pine trunks support conical stack of mud covered logs, Arizona, United States of America, North America