Austin's street lighting system began in 1895 when the first of the original 31 towers was mounted. From a height of 165 feet, a cluster of six carbon arc lamps (now mercury vapor) casts a glow over a radius of 3,000 feet. Only 17 towers remain, and Austin is the U.S.'s only city with a tower system still intact. For locations, contact the Austin Visitor Center at 866/GO-AUSTIN.