Here we have the temples of Sodom and Gomorrah. They worshipped other God's here. The walls of the temples were subject to such great heat in the destruction of the city that the stone has been converted to ash! Some white powder was found on the ground next to a rock. The people who found it did not know what it was, so they sent a sample to the lab. The lab called back and asked: Where did you get this? And they told them. The lab said: This is gold! Gold turns into a powder substance when subject to 3,000 to 4,000 degrees! Well now we know how hot it Got during the destruction of the city.
Here's a link: http://www.pinkoski.com/sodom.html This page has great picture. Notice the picture that has sulfur balls in it spread all over the ground. Brimstone = sulfur. And that's what God destroyed the city with.
Also, if you like in depth studying along with maps, pics and more history on this you can go here: http://www.biblebelievers.org.au/bb971126.htm