Treasure Island: A Man Made Island

Treasure Island isn't an actual island. It's a man made island made from layers and layers of mud and soil compacted together. It was constructed in 1936 to 1937, all from landfill. The original idea behind the "island" was to be an airport.  But then they hosted the World Fair of 1939, it held architecture form all over the world. Islamic, Modern, Egyptian, you name it. The well-known was the Tower of the Sun. It had been designed by Arthur Brown Jr., who had also designed The City Hall. Rising at 329 feet, it quickly became the gem of the crown and the center piece of the fair.
At the end of 1960's, the World Fair had been taken down and the U.S. Navy took over. They demolished all of the towers and buildings. Replaced them with Navy buildings for their use. At the new Navy base, they trained the new recruits. 1993, U.S. Navy closed down the center, leaving all of their buildings abandoned. To this day, the island still has the building and the original three that were built when the island was. San Francisco is currently working on a Development Plan. They plan on adding more residential and commercial usage. With more outdoor usage space, and more restoration.