First of all - you've got to bribe the security to let you in and act like you know what you're doing. You have to climb all those floors and the torch comes in handy as it's completely dark. The view from the top is amazing and if you happen to be alone it might be creepy too but exciting!
A very nice mix of river, prairie, bottomland, pond, overlooked by the Tetons. If you catch it when there is no wind you can have the water mirror the mountains- an iconic photo!