Mount Rushmore National Monument is located in South Dakota’s Black Hills.  The sculptured figures of George Washington, Thomas Jefferson, Theodore Roosevelt, and Abraham Lincoln stand watch.  

George Washington (1789-1797)

Happiness depends more upon the internal frame of a person’s own mind, than the externals in the world.

Thomas Jefferson (1801-1809)

The tree of liberty must be refreshed from time to time with the blood of patriots and tyrants.