Old Tjikko (Sweden) - 9,550 Years Old
The world's oldest tree is Old Tjikko, a tree in Sweden that dates back to the last Ice Age. It was found by geologist Leif Kullman and named for his late dog.
Methuselah (California, USA) - 5,000 Years Old
Nestled in California's White Mountains, Methuselah stands as the oldest non-clonal tree. Its exact location has been kept secret to protect it.
Langernyw Yew (Wales) - 4,000 Years Old
The Langernyw Yew in Wales, which was planted during the Bronze Age, is honored as a Great British tree in honor of Queen Elizabeth II's diamond jubilee.
Zoroastrian Sarv (Iran) - 4,000 Years Old
Sarv-e Abarqu, an Iranian national monument, is probably the earliest surviving object in Asia that has seen the rise of human civilization.
Fitzroya Cupressoides (Andes Mountains) - 3,600 Years Old
Known as Alerce this evergreen species in the Andes Mountains has faced logging threats marking a symbol of endurance.
The Senator (Florida, USA) - 3,500 Years Old
The Senator in Florida, which bears the name of Sen. M.O. Overstreet, weathered hurricanes and is notable for its remarkable size and past.
Patriarca da Floresta (Brazil) - 3,000 Years Old
This sacred tree in Brazil, which represents the species Cariniana Legalis, is in danger because of the clearance of forests under South American nations.
The Tree of One Hundred Horses (Sicily) - 2,000 to 4,000 Years Old
This chestnut tree is the largest and oldest known chestnut tree in the world, and it is found atop Mount Etna in Sicily.
Olive Tree of Vouves (Crete) - 2,000 to 3,000 Years Old
The Olive Tree of Vouves in Crete, one of only seven olive trees in the Mediterranean, continues to yield valuable olives with exceptional tenacity.
General Sherman (California, USA) - 2,500 Years Old
General Sherman is the world's largest non-clonal tree by volume, and it is the mightiest giant sequoia.