The Denver International Airport, being one of the 20 busiest airports in the nation, hosts the Internal Garden in its C terminal. Spanning multiple floors the Internal Garden is an enormous open space lush with vegetation and is enclosed by sculpted walls. Surrounded by various restaurants and waiting areas, this garden is the center of the C terminal and is a great place to relax while waiting for a flight.  As I often have connecting flights in Denver, the Internal Garden is always a refreshing sight to see after having been cramped in an airplane for hours.