El Dorado - the mysterious city of gold!!Many have loved this concept and personally,being a crazy about any Mandrake's adventures,it's a great pleasure for me to find a Mandrake story based on it! Of course,where is Mandrake(& Lothar),some kind of criminal activity has to be there and so you will find in this adventure aswell!!
First read this in a Bengali Indrajal Comics (খন্ড 21 সংখ্যা 6 - সোনার শহর এল্ ডোরাডো) and only years after,the original strip-version.[This unedited strip(i.e. 6 panels/sunday) is one of the numerous contributions by Magnus & Dan.]
And here's cover of the Indrajal version:
The wiki page on El Dorado : http://en.wikipedia.org/wiki/El_Dorado