Pyramids, cathedrals, radio towers--human beings have been building colossal structures for thousands of years. This video takes a look at the tallest structures humans have built throughout history.
Channels: Interesting Science Archaeology History
Tags: skyscrapers buildings pyramids cathedrals
Uploaded by: layne.ransom.5 ( Send Message ) on 23-11-2012.
Duration: 10m 6s