Arlington National Cemetery was once Gen. Robert E. Lee's plantation

Appalachian Trail is the nation's longest marked footpath, at approximately 2,178 miles.

The state of Vermont does not have a single billboard ad.

Eight Presidents were born in Ohio, more than any other state.

Reno, Nevada is west of Los Angeles, California.

Half of the of Florida is covered in swamp.

California has the highest and lowest point in the contiguous United States -- Mt Whitney and Death Valley.

Maine is the only state whose name has just one syllable.

Jimmy Carter was the first president born in a hospital

The "ZIP" in Zip Code, stands for Zoning Improvement Plan.

The Pacific Crest Trail is 2666 miles long.

All of Florida is South of California.

Washington DC originally included 30.75 sq mi on the Virginia side of the Potomac River.

The ZIP Code was started in 1963. In 1983, the U.S. Postal Service began to use an expanded ZIP Code called ZIP+4.

Both John Adams (second US President) and Thomas Jefferson (third US President) died on July 4, 1826, the fiftieth anniversary of the signing of the Declaration of Independence. James Monroe, the fifth President passed away on July 4, 1831.

The base at the Alyeska Ski Resort is located at just 250 feet above sea level, but despite the relatively low elevation, much of Mt. Alyeska Alaska is above tree-line

Rivers that run south to north: The Tennessee River, the Willamette River in Oregon, the St. Johns River in Florida, the Fox River in Wisconsin, the Lachute River in upstate New York ,The Green River and the Kentucky River, both in Kentucky.

Benjamin Franklin invented the Lightning rod, the Franklin Stove, Bifocals, the Armonica, Daylight Savings Time, the Odometer and was also the first to accurately map the ocean currents.

Lake Michigan is the largest lake entirely in the United States. It is also the only one of the Great Lakes so designated. Half of Lake Superior is in Canada.

Calvin Coolidge, the 30th US President, was born on July 4th, 1872.