the biggest contributor to your page speed being so incredibly slow is the image files sizes. I have attached some reduced image files, from your site. Some of the images on your site are over 2MB each. It is best to get the best quality images you can with as little file size as possible. If an image does not use any trancparency then, you might want to consider use .jpg file type for those images. reverse the .png image filt ype for the images that have tranparency.
You need to have a decent image utility software. For ( .jpg ) files there is a great free software named faststone image viewer. It also does a good job on some ( .png ) image files.
www.faststone.org
If you like you can save the attached images and replace the ones on your site.