Pirangi Cashew Tree, Brazil

Upon approaching the world’s largest cashew tree, you might think you’re entering a forest. But despite covering about 8,500 square meters, it is indeed a single tree. The 117-year-old tree, which is 80 times larger than an average cashew tree, has become a bit controversial ever since its roots started taking over a nearby highway, only allowing one car to pass at a time. Specialists fear it might die if trimmed It currently takes up an area larger than a soccer field and bears 80,000 fruits per year

Axel Erlandson’s Circus Trees

Axel Erlandson was an American ‘arborsculptor’ who planted trees in specified patterns and pruned, bent and grafted them into shapes not seen in nature. He opened a horticultural attraction in 1947 near Santa Cruz, California named “The Tree Circus”, and people flocked in from all over the country to view his unusual and striking creations. After the land changed hands several times, 24 of Erlandson’s trees ended up in the Gilroy Gardens amusement park. The 5 pictured are the “Basket Tree”, “Telephone Booth Tree” the “Two Leg Tree” and two with unknown name

Crazy Palm Trees' Growth

The homemade recipe that skyrocket your palm trees'growth...Like Crazy

Baobab

The amazing baobab [wiki] (Adansonia) or monkey bread tree can grow up to nearly 100 feet (30 m) tall and 35 feet (11 m) wide. Their defining characteristic: their swollen trunk are actually water storage - the baobab tree can store as much as 31,700 gallon (120,000 l) of water to endure harsh drought conditions.
Baobab trees are native to Madagascar (it’s the country’s national tree!), mainland Africa, and Australia. A cluster of "the grandest of all" baobab trees (Adansonia grandidieri) can be found in the Baobab Avenue, near Morondava, in Madagascar:

Bristlecone Pine: Methuselah and Prometheus, the Oldest Trees in the World.

The oldest living tree in the world is a White Mountains, California, bristlecone pine (Pinus longaeva) named Methuselah [wiki], after the Biblical figure who lived to 969 years old. The Methuselah tree, found at 11,000 feet above sea level, is 4,838 years old - it is not only the oldest tree but also the oldest living non-clonal organism in the world.
Before Methuselah was identified as the world’s oldest tree by Edmund Schulman in 1957, people thought that the Giant Sequoias were the world’s oldest trees at about 2,000 years old. Schulman used a borer to obtain a core sample to count the growth rings of various bristlecone pines, and found over a dozen trees over 4,000 years old.
The story of Prometheus [wiki] is even more interesting: in 1964, Donald R. Currey [wiki], then a graduate student, was taking core samples from a tree named Prometheus. His boring tool broke inside the tree, so he asked for permission from the US Forest Service to cut it down and examine the full cross section of the wood. Surprisingly the Forest Service agreed! When they examined the tree, Prometheus turned out to be about 5,000 years old, which would have made it the world’s oldest tree when the scientist unwittingly killed it!

Banyan Tree: Sri Maha Bodhi Tree

The Banyan tree is named after "banians" or Hindu traders who carry out their business under the tree. Even if you have never heard of a Banyan tree (it was the tree used by Robinson Crusoe for his treehouse), you’d still recognize it. The shape of the giant tree is unmistakable: it has a majestic canopy with aerial roots running from the branches to the ground.

Montezuma Cypress: The Tule Tree

Close-up of the tree’s gnarled trunk. Local legends say that you can make out animals like jaguars and elephants in the trunk, giving the tree the nickname of "the Tree of Life" (Image credit: jvcluis [flickr])
El Árbol del Tule [wiki] ("The Tule Tree") is an especially large Montezuma cypress (Taxodium mucronatum) near the city of Oaxaca, Mexico. This tree has the largest trunk girth at 190 feet (58 m) and trunk diameter at 37 feet (11.3 m). The Tule tree is so thick that people say you don’t hug this tree, it hugs you instead!
For a while, detractors argued that it was actually three trees masquerading as one - however, careful DNA analysis confirmed that it is indeed one magnificent tree.
In 1994, the tree (and Mexican pride) were in jeopardy: the leaves were sickly yellow and there were dead branches everywhere- the tree appeared to be dying. When tree "doctors" were called in, they diagnosed the problem as dying of thirst. The prescription? Give it water. Sure enough, the tree soon recovered after a careful watering program was followed.