Reunion Tower, Dallas

This Dallas landmark has graced the downtown skyline since 1978. Three levels of activity top the 50-story structure, which are encircled in a dome of lights. The triangle formations of the structural cylinders encase the elevators that carry passengers to the top levels in 68 seconds. For the more actively inclined, an 837-step stairwell is located in the middle of the tower. Over 200 lights add shimmer to the geodesic dome, which can be programmed to form an infinite number of patterns. Some of the more famous include "The Electric Moon," "Texas Raindrops" and "Dallas Disco Fever." The tower opened in 1978, just two years after construction began and only five years after its conception. The Lookout is the lowest of the upper levels and provides both an indoor and outdoor observation area. Visitors can view many points of interest throughout the Dallas area from 360-degrees.