While most enviromentalist organizations, like the Sierra Club, use their resources to pressure government into stealing the public and private land use rights of everyone, the Nature Conservancy actually goes to the marketplace and buys the land they wish to protect. Through their efforts, we now have a new national park:

Great Sand Dunes National Park – The tallest sand dunes in America rose to new heights Monday when Interior Secretary Gale Norton signed documents creating the Great Sand Dunes National Park and Preserve.
At a sun-splashed dedication ceremony, Norton officially redesignated the Great Sand Dunes National Monument and Preserve as the nation’s 58th and Colorado’s fourth national park.

The declaration was made possible when the Nature Conservancy on Friday completed the last of a set of real estate transactions to buy the 97,000-acre Baca Ranch, which borders the sand dunes, a geological jaw-dropper nestled at the foot of the Sangre de Cristo Mountains.