Step inside the reimagined Space Needle in Seattle

Seattle’s most iconic landmark got its start as a flying saucer sketch on a napkin.

It took 400 days to build the Space Needle, which officially opened to the public on April 21

1962 for the space age-themed Century 21 Exposition World’s Fair.

Since then, nearly 60 million people have visited the building – among the most recognizable in the world

While most Seattleites and visitors are already familiar with the tower’s curving, wasp-waisted silhouette,

many might not recognize the interior, especially after undergoing a $100 million renovation.

The original pony walls and security caging on the outdoor observation level are gone

replaced with open-air glass walls that tilt out toward the city.