Here is where I drew some meaning from:
http://www.bibletools.org/index.cfm/fuseaction/Topical.show/RTD/cgg/ID/3665/Sodom-Egypt.htm
I do not think this is perfect in its interpretation, as it too points to Rome.
I do fine it fascinating that no interpretations dare breach any evidence as to Islam. Yet, considering Islam as the potential Harlot sitting on the Temple Mount of seven hills....etc.
I would recommend reading Ezekiel 16... this way one can know what the Heavenly Father says not what biases we in flesh bodies get fed.