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1. Coast Starlight Line - Seattle to Los Angeles (USA)
We’re starting this list off with a familiar enough locale, even if you’ve never been out west. The Coast Starlight line takes you up (or down!) the west coast, passing by notable geographic features like the Pacific Ocean, Klamath Falls, Mt. Shasta and Mt. Rainier. Traveling the entire coast takes around 35 hours, so be sure to book a sleeper cabin and bring lots of snacks!