What other landmarks can be energy efficient?

You Stay Awesome Empire State Building |http://j.mp/17I5mGV

38 Percent: The amount of energy use that was cut.
$2.3 Million: The amount saved in 2011.
$2.4 Million: The amount saved in 2012.
$4.4 Million: The amount to be saved annually once all upgrades are completed.

What landmark would you like to see go solar?