Multiple choice general knowledge

What famous American landmark is constantly moving backward?

  1. Empire State Building

  2. Niagara Falls. The rim is worn down about 2 and a half feet each year because of the millions of gallons of water that rush over it every minute.

  3. Mount Rushmore

  4. Natural Bridges National Monument
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Niagara Falls is gradually eroding and moving backward (upstream) due to the millions of gallons of water rushing over it every minute. The erosion rate is approximately 2.5 feet per year. The Empire State Building and Mount Rushmore are stationary structures, and Natural Bridges is not known for backward movement.

Keep practicing — related questions