Paul was there and could not find words to explain to us how awesome it was. This incident can't be tied directly to a single event in Paul's life, although some think this may have been when he was stoned and left for dead. Paul writes this piece of scripture to show how he had been uniquely touched by God. One thing is for certain – we will not be disappointed at all!
2 Corinthians 12:1-6
"Boasting is necessary, though it is not profitable; but I will go on to visions and revelations of the Lord.
I know a man in Christ who fourteen years ago--whether in the body I do not know, or out of the body I do not know, God knows--such a man was caught up to the third heaven.
And I know how such a man--whether in the body or apart from the body I do not know, God knows was caught up into Paradise and heard inexpressible words, which a man is not permitted to speak.
On behalf of such a man I will boast; but on my own behalf I will not boast, except in regard to my weaknesses.
For if I do wish to boast I will not be foolish, for I will be speaking the truth; but I refrain from this, so that no one will credit me with more than he sees in me or hears from me."