99 invisible
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The Secret Ways Airports Tell Us Where To Go
As humans have developed cities and built environments, we have also needed to develop ways to find our way through them. Signage goes back at least as far as the Roman Empire where they constructed “milestones” along their roadways.
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The Secret Solid Marble Bathtubs In The US Senate’s Boiler Room
In 1869, the bathtubs in the basement of the US Capitol building looked something like the painting below.
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The College Kid Who Built A Secret Tunnel Underneath The Berlin Wall
At its peak, the Berlin Wall was 100 miles long. Today only about a mile is left standing. Compared with other famous walls in history, this wall had a pretty short life span.