There are a few spots where the wall either cuts off or potentially will go over cemeteries.
There is this cemetery and site with the underground railway
A stop on the Underground Railroad and an early African-American burial site in South Texas are endangered by the first section of Trump's border wall.
Also of interest to native americans
Members of a Native American group have camped out for a month in a South Texas cemetery to protect graves and a chapel from border wall construction.
Another cemetery near San Juan (might be the same?)
The Eli Jackson Cemetery is feet from a levee where Customs and Border Protection’s new fencing is scheduled to be constructed this year.
Another cemetery cut off near Brownsville
For more than a year now, volunteers have maintained a historic cemetery that sits past a section of border wall in south Texas. The cemetery includes the graves of nearly two dozen veterans. One volunteer believes the wall discourages people from visiting.
Also potentially several more