http://www.popsci.com/scitech/article/2004-09/amazing-rusting-aluminum

The tip of the Washington Monument is capped with an Aluminium apex commemorating the monument. At the time it was made aluminium was as valuable a metal as silver and gold.

Did you know that aluminium can react to both acid and base?
That's cool if you think about it.

Basically, Aluminium(Aluminum) is the best metal ever!