Here's the deal ... Donald and his kids had their late mother buried at Trump National Golf Club in Bedminster, NJ about a week and change ago -- which might sound like a strange place to entomb a loved one ... but, hey, to each their own. It's a family decision.

The problem now is that pictures of her actual gravesite have surfaced for the world to see -- this after being snapped and published by the New York Post -- and people are shaking their collective heads at the images ... which many are calling sad, bare and disrespectful.

Indeed, her burial plot does appear a bit ... bland. And not just that, but it's completely isolated -- without any adornment or much of anything else to honor her, save for a small bouquet of white flowers and a marble plaque that seems slapped down at her feet.

As some pointed out, her gravestone inscription has barely any writing on it at all -- just her name and her DOB and DOD ... that's about it. No other words of remembrance for Ivana.

While it might seem like a bizarre sight -- and just a weird and inappropriate place to bury DT's ex-wife -- this is actually something The Donald has reportedly been gunning for for a while ... namely, getting authorization for a decent amount of burial plots on his property.