After posting about the Expo '70 Mushballoons, I was alerted to the existence of this great animation featuring Osaka's Expo '70. It's based on a popular Japanese comic strip called Sazae-san.
You can see several iconic structures: the Tower of the Sun, the Mushballoons, and even the Australian Pavilion, whose architect we interviewed on the World's Fair Podcast.
This great illustration shows the basic layout of the three towers from Osaka's Expo '70: from left to right, the Tower of Motherhood, the Tower of the Sun, and the Tower of Youth.
Seemingly floating through the top of the Tower of the Sun is the space frame that served as a roof for the central plaza of Expo '70. The site is now an empty field with just the Tower of the Sun.