A couple stares at the silhouette of Shimabara Castle's keep, dubbed "Castle Monster," which appears in the sky over the Sea of Ariake from the castle tower in Shimabara, Nagasaki Prefecture, on ...

In this night-sky photo from Mértola Village in Portugal's Dark Sky Alqueva Reserve, a dark silhouette of the moon's round face is visible, along with the thin, bright sliver of the waxing ...

A silhouette of a First World War Tommy projected on to Edinburgh Castle. Picture: PA Wire This article contains affiliate links.