The graveyard has some extremely ornate and fascinating tombs, replete with skulls and croseones and other symbols of death.
The tombs are plain and ordinary, lacking any type of embellishment. 
mnli hypothesis: The tombs are plain and ordinary, lacking any type of embellishment.  premise: The graveyard has some extremely ornate and fascinating tombs, replete with skulls and croseones and other symbols of death.