Sep 03, 2016: The male corpse, wearing a cashmere jumper and carrying climbing equipment, was found face-down and twisted in an unnatural position on the Pico de Orizaba volcano in June 2015.
Experts believe the man died 50 years ago and would have been mummified for about the last 15 years.
It is now on display at a museum in the city of Ciudad Serdan, in the southern Mexican state of Puebla.
The man was short and slim and experts say he died from an injury, with the low temperatures near the top of the 5,600-metre volcano leading to his eventual mummification.
Juan Navarro, the mayor of Ciudad Serdan, said: "The mummy is intact, he has hair, nails and teeth."
There are many speculations as to who the mummy might have been. Some believe he was a tramp, whilst others think he fell from a small plane or that he was an inexperienced climber.
The body has not been identified or claimed however and it will now be left on display at the museum for all to see.
The mummy must be kept at a certain temperature at all times to keep it from decomposing.
The body was found by a group of hikers. Mr Navarro said: "Global warming is the reason the mummy came to light."
The mummy will also be used to raise awareness about the importance of taking care of the environment.
It may well be joined by three other mummies which are still currently on top of the volcanic mountain and have not been removed because bad weather makes it difficult to get to them.
Two of the mummies were found in a hugging position and said to have died in an avalanche in 1959.