10 Dollars - Elizabeth II Cologne Cathedral

The Cologne Cathedral took over 600 years to complete — begun in 1248, construction stalled for nearly three centuries before resuming in the 19th century, finally finishing in 1880. For much of that interval, a massive unfinished crane sat atop the south tower and became so embedded in the city's identity that Cologne residents used it as a directional landmark. The cathedral was deliberately spared Allied bombing in World War II, reportedly used as a navigational reference point by Allied aircrews — though it still sustained significant damage from nearby strikes.