Rocky Mountain High (S04E05)

In Denver, the cannabis industry is booming. With more medical marijuana dispensaries than Starbucks coffee shops, the city is fast becoming the U.S. capital of weed. In November 2012, Colorado went further, voting to allow the recreational use of marijuana, one of only two states to do so. Meet entrepreneurs who have developed the first marijuana-themed package tour in the U.S., which guides visitors through a weekend packed with activities and plenty of weed. (National Geographic)