A winter bridge made of moving sea ice
The Diomede Islands sit in the Bering Strait, between Alaska and Russia. In winter, sea ice can fill the water between them, creating a surface that appears to join the islands. But this is not a dependable frozen road. Ocean currents and winds shift the ice, opening cracks and leads—stretches of exposed water—or piling floes into unstable ridges. A route that looks solid from shore may change while someone is on it.
A short distance, a serious crossing
The ice does not erase the strait’s remoteness or its international boundary. The crossing involves unpredictable sea ice and severe cold, with little margin for rescue if conditions turn. The islands are also on opposite sides of the International Date Line, which follows the gap between them: the two shores face each other across a narrow stretch of water, but belong to different countries and different calendar days.
That contrast is what makes the sight so striking: winter can briefly make the boundary look walkable, without making it safe or simple to cross.
