This is how one billion dollars look like :)

So, compared to this $1 million dollar stack:

Here is how $1 billion dollar looks like:

Bonus

Here is how $1 trillion dollars looks like:

Or it can look like this:

Extra Bonus

Here is the US debt in 2013 ($16 trillion):

Well, now it’s over $19 trillion, so you have to add some additional ‘money buildings’.