This 10-state region isn't flat; it rises from 2,000 ft. near Omaha to 6,000 ft. at Cheyenne
Longer than the Mississippi, this river wasn't made navigable until the 20th century
Raleigh, Durham & Chapel Hill are the 3 apexes of this state's famed Research Triangle
All of Connecticut's port cities are on this arm of the Atlantic
Glacier National Park & the Custer Battlefield are among this "Treasure State"'s treasures
State where you can visit Hot Springs National Park & Crater of Diamonds State Park
The most densely populated state; every one of this middle Atlantic state's 21 counties has over 50,000 people
City that stands on the ruins of Tenochtitlan, the capital of the Aztec people
The highest airport in the world is Lhasa Airport in this country
The hot water heating of this northern European capital is drawn directly from underground springs