In February 1942, searchlights locked onto a strange object over Los Angeles, triggering a massive anti-aircraft barrage. Many believe it wasn’t an enemy plane at all.

Across the U.S., along highways and backroads, are attractions that range from the oddly charming to the downright puzzling.

Perched above the Danube, Bratislava’s UFO Bridge is both an icon and a reminder of what was lost. Its Cold War origins reshaped the city forever.