The arrogance you harbor is astounding - may Allah (subhanu wa tala) guide you. The Qu'ran speaks of its existence; the Qu'ran is a book sent from God, which makes it another form of evidence.
But if you still doubt and desire "real evidence," modern-day archaeologists have
found evidence at the excavation site of Tall el-Hammam, which is believed to be the
location of the city of Sodom.
If they didn't want to be discriminated against,
maybe they shouldn't have committed a crime against humanity and become homosexuals. Just some food for thought.