Agreed, there aren't any sand dunes in the Mojave, Faldage.

But that strip of Mojave displayed at your link looks like any other stretch of scrub in the U.S. south-west, or a thousand other places.

And a Gobi sand dune looks just like a Sahara sand dune, or any other sand dune.

But, Singapore, that's something else altogether.

Singapore doesn't look like any other place. And that's the point. That's why Singapore is "Uniquely Singapore".

You couldn't say the Mojave is "Uniquely Mojave". That would be "meaningless advert-speak"!

You could say Father Steve has the right pew but the wrong church. :)