The mouth of which river was discovered in 1673 by the French explorers Jacques Marquette and Louis Jolliet while they were canoeing down the Mississippi River?

Where in the United States is Death Valley?

Tallahassee is the capital of which U.S. state?

Which boundary in the United States, together with the Ohio River, was regarded in the pre-Civil War period as the dividing line between the slave-holding states in the South and the free-soil states in the North?

In what U.S. state can the world’s tallest trees be found?

Which of these lakes is entirely within the United States?

In what U.S. state is Pavlof Volcano located?

Which U.S. city is situated at the confluence of the Delaware and Schuylkill rivers?

Which major U.S. city is closest to the junction of the Mississippi and Missouri rivers?

What U.S. city is New Hampshire’s only seaport?

Which large city in southeastern Michigan was founded by Antoine Laumet de la Mothe Cadillac?

Who founded the settlement that later grew into the city of Chicago?

On which of the North American Great Lakes is Cleveland, Ohio, located?

In which two U.S. states is Okefenokee Swamp located?

Into which bay does the Potomac River flow?