The United States Postal Service has its own stamp cave. The USPS says its shortest rural delivery route is Carrollton, Texas, a job that requires just 1.2 miles of daily travel. The mail carrier in Parker, Colorado, has it relatively easy, only traveling 2.3 miles each day.

Not every carrier is piling up the daily mileage. The shortest USPS rural mail route is under 3 miles. The mail carrier travels a whopping 190.7 miles. Sidney, Montana, boasts an unusual claim to fame: The remote town has the longest rural delivery mail route. The longest United States Postal Service mail route is more than 190 miles. In Alabama’s Magnolia River, 176 homes on the 31-mile route receive their deliveries from a 15-foot boat that pulls right up to fixed mailboxes on their docks. The Detroit River isn’t the only place where you can receive your mail by boat. The mail boat pulls alongside larger vessels, which lower down a bucket on a rope that can be filled with correspondence-the custom is known as “ mail in the pail.” The boat even has its own special ZIP code: 48222. Legally, the postal service has to deliver mail to all Americans, even those aboard ships. Westcott II, has a contract to deliver mail to passing ships sailing on the Detroit River. Meanwhile, in Michigan, a 45-foot mail boat, the J.W. Since so much of the mail is perishable, the post office where this route originates in Peach Springs, Arizona, has walk-in freezers. The local Havasupai tribe receives its mail after an 8-mile journey by 50 horses and mules. Every day, mule trains deliver about 4000 pounds of mail, food, supplies, and furniture to the village of Supai. How do you get mail to the bottom of the Grand Canyon? By enlisting the help of mules. Trusty mail carriers hoofing it down the Grand Canyon.

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