The Divine Lingam 

The Sanskrit word for the male sexual organ is Lingam (pronounced LING-AHM), and is loosely translated as "Wand of Light."  It's meaning is different in intention from the typical Western view of the penis.   In Tantra/Sacred Sexuality, the Lingam is respectfully viewed and honored, a "Wand of Light" that channels creative energy and pleasure

The most famous of all lingams in the world, is the Washington Monument.  It is an oversize copy an Egyptian obelisk. The ancient Egyptians believed that the spirit of the Egyptian Sun god, Ra - who represented the ultimate in masculinity and power - resided within the obelisk,

The sex act between male and female is represented by an lingam within a circle (yoni).   circle.  The Washington Monument sits within a circle.
Though it can be used as a technical term for the male phallus, specifically, lingam is a Sanskrit term of reverence for the statues and  images of the god Shiva’s genital organ. The thousands of lingams one finds throughout India and Nepal, on almost every street corner and in every village square, are worshipped even today as sacred symbols of Shiva (the "Destroyer" aspect in the all-male Vedic trinity); most especially the twelve sacred jyotirlinga. People kiss and touch the statues, which are generally sculpted from stone; they offer rice, flowers, or fruit to them and will often color them with red ocher.

The Gupta-sadhana Tantra states that "infinite result is obtained by worship of a Sivalinga that should be made of crystal etc., but never of clay". 

Shiva in the Lingam with Brahma above, and Vishnu below as a wild boar. 

Lingam erected at 1994 Burning Man Festival

Shiva-Lingam - found on almost 

every street corner in India

 

Shiva Lingam
Lingam Stones from the Nomad River in India. Lingam stones are known as the stone of the Kundalini, and as a stone of fertility. They range in size from a few inches to several feet. Formed when an asteroid slammed into the river thousands of years ago. The rushing water breaks the stones up and tumbles them into this lingam form.

A Shiva Lingam

 A shrine to the lingam in Bangkok, with lingams from 6 inches to 4 four feet.