How to get there
To get to the Grand Canyon, travel to Phoenix, Arizona first. It is about a 4 hour drive from Central Phoenix to the South rim. The entrance fee to the Grand Canyon is $25 per vehicle to cover maintenance costs. However if you possess a National Parks Golden Eagle pass the cost is reduced.
Importance of the site
The fact that the Grand Canyon is listed as a World Heritage site means a lot to groups and governments involved. Conservationist groups major argument was that the parks wilderness aspect was being exterminated by visitors trampling carelessly and coming too often. The excessive visitors were causing lack of biodiversity. The Grand Canyon met all four requirements of UNESCO World heritage customs thus becoming a World Heritage Site.

Site Management
The US National Park Service managed the sight since 1919 as a National Park. This was before it became a World Heritage Site. There was a site management plan made in 1977 in accordance to the Environmental Policy act of 1969.
Characteristics of the site
This is a natural World Heritage site, not cultural as humans did not make it, the environment did. The sheer spectacular view would leave you speechless. The canyon is a world heritage sight as of 1979. It is revered for historical importance as it tells us history dating back millenniums. It helps in understanding of geological activity in the last 6 million years as nothing but the elements created it.
Location
Located in the state Arizona, in America the Grand Canyon shows millenniums of history. The abyss is nearly 1500m deep.
Climate
At the Grand Canyon the weather varies, and often the north rim and the south rim are different. The temperature can rise or drop dramatically, so be prepared for anything. Also, altitude sickness can occur due to being so high up. The South rim is 7000 feet above sea level, and the North rim is 8000 feet above sea level. At the south rim, June and July are the warmest however it is also the rainiest season. The coolest time is January, reaching down to -8c Celsius. The north rim is generally colder than the south, with the rainfall being higher and the temperature cooler.