Border Tunnel Site, Washington

In 2005 a drug-smuggling tunnel was discovered by border officials, just a hundred yards east of the Lynden/Aldergrove Port of Entry. It connected a Quonset hut on 0 Avenue, on the Canadian side, to a house in the trees on the south side of Boundary Avenue, on the US side. After the smugglers were arrested and convicted, the tunnel was destroyed by excavating the ground above it, and filling it in. Though more than 30 such tunnels have been discovered on the Mexican border, this was the first on the northern border of the US.  The Quonset hut on the Canadian side has since been torn down. The house on the US side, where the tunnel emerged from under the living room floor, is still there.