5 Dollars - Elizabeth II Castle Neuschwanstein

Nauru, a phosphate-depleted microstate in the central Pacific, began issuing novelty gold coins in the 2000s largely as a revenue mechanism — the island has no meaningful numismatic tradition and these pieces were never intended for circulation. This particular issue is one of dozens in a sprawling series depicting European landmarks, bearing no geographic or historical connection to Nauru whatsoever.

Neuschwanstein itself was unfinished at Ludwig II's death in 1886 and was opened to paying tourists just weeks later — a commercially motivated decision that continues uninterrupted today.