Parameters are a great way to add interactivity to a worksheet or dashboard; this allows the end user to see which values or metrics are most important to them.  I'm originally from Wisconsin, but now live in Colorado.  As such, I built a dashboard comparing the major climate characteristics of Denver and Milwaukee.  The dashboard can be found here.  The metrics include:

• Average hours of sunshine
• Average high and low temperature
• Average amount of precipitation
• Average amount of snowfall

All metrics are measured and displayed on a monthly basis.  I utilized a parameter to allow the end user to select which metric to display.  Download the workbook and try for yourself!

Tableau has impressive mapping capabilities and continues to refine these abilities in each new release.  Living in Colorado, it comes as no surprise that I really enjoy hiking.  In Colorado, there are 53 mountain peaks that are higher than 14,000 feet, which are commonly known as "14ers".  I used Tableau to map the location of each of these as well as some other important information, such as what mountain range the peak is in and the standard route difficulty, length and elevation gain.  Check out the dashboard here.