Czech presidents, like many heads of state, have the power to issue amnesties and pardons.

WSJ: Czech Freedom Rings Off-Key

The hotel's grandeur has attracted presidents from many countries, musicians like the Beatles and Taylor Swift, and celebrities of every era, from Buffalo Bill Cody to Oprah Winfrey.

BBC: Historic hotels of Colorado

In addition, many green-minded schools, like Yale and Stanford, aren't part of the American College and University Presidents Climate Commitment, an agreement by university presidents to make their school carbon neutral.

FORBES: Magazine Article