The Seattle Landmark is the Space NEEDLE, a 6-letter word. The Space NEEDLE is an observation tower located in Seattle, Washington, United States. It was built in 1962 for the World's Fair and stands at a height of 605 feet. It has an observation deck and a rotating restaurant at the top, offering spectacular views of the city and surrounding area. It is one of the most recognizable structures in the world and a symbol of Seattle.