Reunion Tower is a 561 ft (171 m) observation tower and one of the most recognizable landmarks in Dallas, Texas. Located at 300 Reunion Blvd. in the Reunion district of downtown Dallas, the tower is part of the Hyatt Regency Hotel complex, and is the 15th tallest building in Dallas. A free-standing structure until the construction of an addition to the Hyatt Regency Dallas in 1998, the tower was designed by the architectural firm Welton Becket & Associates.