Hexagrams in steel picture is courtesy of Hadar from Flickr who wrote to me:
I took it on the Yarkon river bridge, near Ibn-Gvirol street, in Tel Aviv.
This blog (by Zeev Barkan) is dedicated to the Star of David, its history, its various meanings and usages in different cultures. It includes thousands of pictures of Star of David, six-pointed stars, hexagrams, Solomon's Seals, Magen Davids and yellow badges,and served as a resource for three books and four art exhibitions.
I took it on the Yarkon river bridge, near Ibn-Gvirol street, in Tel Aviv.