He finds one frozen in ice being worshiped by natives in the Himalayas. But then Jones has to rescue it from the Japanese who plan to thaw it out, kind of like that Superman cartoon with the T-Rex discovered in the Arctic.
If the question is, "Should dragons exist in X universe?", the answer is always YES.
"There is still hope." - Arwen, LotR "No man controls my destiny. Especially not one who attacks downwind and stinks of garlic." - Azim, ROBIN HOOD "Do you stop believing in the moon just because the sun comes out?" - Jack Frost, RISE OF THE GUARDIANS "I am no man." - Eowyn, LotR "I am Diana of Themyscira, daughter of Hippolyta, & your wrath upon this world is over." - Diana, WONDER WOMAN