Things to do in Dallas, Texas

I was asked this question "If you have one thing to do in Dallas, for you, What it is" ? 

To be honest, There is nothing specific that I am passionate about, I believe that I still need to explore the city and spend more time roaming around to find that thing. 

 Meanwhile, I have few things/places that I recommend based on my personal experience: 

• Visit the art district area in downtown, It has few museums within a walking distance: http://www.dallasartsdistrict.org/ 
  crow-collection-of-asian-art
  nasher-museum 

• There are few Jazz bars that I like to  go to :  
  http://balconyclub.com/ 
  http://www.freemandallas.com/

• Get some Tacos :  
  Tacos La Banqueta - 7233 Gaston Ave, Dallas, TX 75214 
  El Come Taco - https://www.facebook.com/El-Come-Taco-367170943406470/

• Explore downtown with Trolley  (Free)
  http://www.mata.org/schedulesroutemap.html

• Get some Texas BBQ  
  http://www.cattleackbbq.com/

• Explore Dallas with DART ($5)
  http://www.dart.org/maps/printrailmap.asp
  

• Cabin Camping and BlueBerry picking