I visited the Dallas Metroplex this past July, staying in Arlington. For more information about Dallas area tourism:
https://www.visitdallas.com.
Time and distance may not allow you to visit many attractions in the Metroplex, but the No. 1 tourist attraction in Dallas is probably the Sixth Floor Museum (
https://www.jfk.org/) in the Dallas County Administration Building (nee the Texas School Book Depository). The Sixth Floor Museum obviously covers the events surrounding the assassination of President Kennedy, but it is also a museum about Kennedy's life and career beyond that. If you somehow get to Arlington (about 20 miles west of Dallas), visit AT&T Stadium which is the home of the Dallas Cowboys. That was an awesome stadium tour when I went. The Southfork Ranch (
http://www.southforkranch.com/) is another popular attraction in the Metroplex, but that is about 25 miles northeast of Dallas in Parker.