What group of islands, located in the Caribbean Sea, is an unincorporated territory of the United States?
What is the deepest lake in the United States, located in Oregon?
Which river is the longest in the United States, flowing entirely within the country?
The Mojave Desert stretches across parts of California, Nevada, Arizona, and which other U.S. state?
What is the highest-elevation state capital in the contiguous United States?
What is the geographical region in the northeastern United States that includes states like Maine, Massachusetts, and Vermont?
Often associated with the Golden Gate Bridge, what major California city is a prominent port and cultural center?
Which U.S. state is known for its 'Finger Lakes' region?
Which major river forms the famous Niagara Falls on the border with Canada?
Which U.S. state has a prominent 'panhandle' in its westernmost region, bordering Colorado, Kansas, and New Mexico?