- Over 1,000 cultural and natural wonders are "World Heritage Sites"
- The Galapagos Islands and Yellowstone were among the first 12 sites named
- The largest slave trading center on the African coast was included on the first list
Originally published June 2014, updated February 4, 2015.
(CNN)Checking off the world's most important natural and cultural wonders can be a herculean task.