Bridges

Postcards for travelers and bridge-watchers: the Golden Gate glowing at sunset and disappearing into fog, Tower Bridge over the Thames, Pont Alexandre III at twilight in Paris, the Mehmed Paša Sokolović Bridge wrapped in mist, and the old stone crossing at Regensburg. Cities and wild coastlines both make the list — Manhattan Bridge from below, Bixby Creek's arch over the Big Sur cliffs.

A steady pick for postcrossing swaps built around travel, architecture, and engineering.