Many structures have been discovered around the world which builders and purposes are unknown. In spite of studies of all kind made by archeologists and scientists, there is no clue about who bult them or for what purpose.

Categories

• Historic Preservation - Restoration Techniques

Product Details

ISBN: 9781495254048
ISBN-10: 1495254046
Publisher: Createspace Independent Publishing Platform
Publication Date: January 19th, 2014
Pages: 38
Language: English
Series: Great Mysteries