has a holiday light show. "Garden Lights, Holiday Nights" began in 2011 featuring displays created with more than 1 million lights, most of them LED. The following year, the show grew to more than 1.5 million lights and attracted more than 160,000 visitors. Chihuly in the Garden Exhibition In 2004, the Atlanta Botanical Garden hosted an exhibition of glass art by Dale Chihuly titled "Chihuly in the Garden". The exhibit ran through the end of October and was extended until December 31, 2004. During the eight-month run, an estimated 425,000 attendees visited the exhibit. The peak per-day rates of 7,500 were double the previous single-day attendance record at the Garden. Chihuly in the Garden returned to the Atlanta location on April 30, 2016 with 19 new installations. Green Expansion Plan The Green Expansion Plan was a large-scale expansion project that was completed in the spring of 2010 that doubled the size of the Garden while modernizing them at the same time. The expansion plan encompassed the construction of a number of new facilities, the most noticeable of which are the new visitor center and canopy walk. The plan was built around five key areas of human and environmental health: sustainable site development, water savings, energy efficiency, materials selection and indoor environmental quality. By employing an array of energy-saving strategies with environmental sustainability considered throughout the project and recycling any trees removed as a result of construction, considerable efforts were made to make this expansion eco-friendly. A 100,000-gallon cistern was installed underground in December 2007 to aid in water conservation; the cistern fills with only an inch and a quarter of rain and waters about 40% of the new gardens. One striking feature of the new visitor center is the innovative green roof, with plants covering nearly 50% of the roof area. It provides natural cooling, sound insulation and additional garden area for visitors, and even a new wildlife habitat. The visitor center leads visitors to the canopy walk. The garden's old parking lot is now a beautiful Edible Garden featuring an outdoor kitchen; this new garden reconnects people with food and healthful eating. And the final aspect of the garden expansion plan is the conversion of its old entry drive to a large cascades garden filled with tropical plants and gently flowing waterfalls. Canopy Walk The Atlanta Botanical Garden is home to the Kendeda Canopy Walk, a skywalk that allows