article_snippet: Surrounded by only mountains and the sea, this small Alaskan town is so isolated that this small Alaskan town's only accessible by North America's longest one way tunnel, which stretches for two and a half miles.
article_snippet: But the tunnel, which alternates directions every half an hour, closes at 11pm until re-opening at 5:30 the following morning.
article_snippet: The building, the Begich Tower is only accessible by a two-and-a-half mile, one-way tunnel, which alternates directions during the day .
highlights_snippet: To access this small Alaskan town, visitors drive 2 and 1/2 miles in one-way tunnel .