This Alaskan peninsula is the last remnant of a bridge that once connected continents.

Countries & Cities · Published 30 September 2026 · Updated 25 October 2026 Swipe more like this →

In short: The Seward Peninsula is more than just a remote Alaskan landscape; it is the physical anchor of the Bering land bridge. Once a vital corridor for human and animal migration between Asia and North America, this rugged terrain now holds secrets of ancient volcanic activity and a vanishing reindeer industry.

Projecting into the Bering Sea, the Seward Peninsula serves as a geographic bridge to the past. During the Pleistocene Ice Age, it formed part of a massive land swath connecting Siberia to Alaska, facilitating the movement of early human populations and diverse species. Today, sites like the Trail Creek Caves and Cape Espenberg offer researchers a window into these prehistoric migrations, preserving evidence of the peninsula's role as a gateway between worlds.

The landscape is defined by dramatic geological phenomena. The northern region hosts the Devil Mountain Lakes, the world's largest maar lakes, created over 21,000 years ago by violent underground steam explosions. Further south, the Kigluaik Mountains dominate the skyline, housing Mount Osborn, the peninsula's highest peak at 4,714 feet. The region also features the Lost Jim Lava Flow, a field formed within the last 2,000 years, and numerous geothermal hot springs that dot the tundra.

Human history on the peninsula is marked by both isolation and ambitious connectivity. Named for Secretary of State William H. Seward, who negotiated the 1867 purchase of Alaska, the area has seen cycles of industry, from mining towns that now stand empty to a reindeer herding program established in 1892. The latter faced a dramatic turning point in 1997 when the domesticated herd vanished after joining migrating caribou. Looking forward, the peninsula remains a focal point for global infrastructure dreams, including a proposed 64-mile rail tunnel beneath the Bering Strait—a project estimated to cost $65 billion.

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