What cave found in New Mexico, is the deepest cave in the continental US?

More Questions:

What country is home to Volvo?

What is the "NPC" abbreviation short for to a video gamer?

Which doctor did Hugh Lofting write a series of books about?

Because it entered the union in 1876, what western US state is nicknamed "The Centennial State"?

What important sensory organ do earthworms lack?

What is the function of the Thyroid Gland?

What phenomenon do cereologists study?

Which film features the line, "I could have been a contender"?

What TV show takes place in the fictional city of Collinsport, Maine?

What was Mary's last name on "The Mary Tyler Moore Show"?

Who played the blind character in the movie "Places in the Heart"?

During which war did the flag flying above Fort McHenry inspire Francis Scott Key's "The Star-Spangled Banner"?

Which New England state was an independent republic for 14 years before joining the union?

What army occupied Addis Ababa in May 1936?

Who flew too close to the Sun??