More than 4.5 million people visited the Grand Canyon National Park in 2013; more than 3.5 million visited Yosemite. That same year, worldwide revenues for Cirque du Soleil, the Quebecois theatrical venture emphasizing extreme feats of acrobatics and agility, were close to $850 million. Fireworks displays, first developed in seventh-century China, are now featured in celebrations throughout the world at tremendous public expense. The …