A “skull bone” of the Buddha was supposedly discovered in a temple in Nanjing China, according to a livescience report: Ancient Shrine That May Hold Buddha’s Skull Bone Found in Crypt.
Here is another story with more photos: Engravings say the skull belonged to Siddhartha Gautama.
It is unlikely the bone actually belonged to the Buddha but not inconceivable.
One of the things that makes Buddhism different from many other religions is the great importance traditionally given to relics. When relics are considered to be of primary importance, the religion can be transplanted more easily than if its authenticity is based on geography.