Has anyone else found a place that does not have a map marker?

When I found Boot Jack Cavern, the discovery name came up in the top left, but no map marker was added. It didnt have much inside, but I thought it was interesting.

Its halfway between Clark Field and Lucky Jim Mine. Maybe a lil more east than exactly halfway.

I found an unmarked RadScorpion Den in the southern part of the Ivanpah Dry Lake, however that sounds like a glitch.

Mojave Wasteland unmarked locations:

Abandoned Shack
Bootjack Cavern
Chance's Grave
Deathclaw Promontory
Fabulous New Vegas sign
Lakelurk Cove
Mercenary Camp
Scorpion Den
Train tunnel
Wins Hideout
The One

I have the Explorer perk, so I have pretty much all the places in the game on the map. However, there are, in fact, some that aren't on the map that I've stumbled across.

The Map will always give you a reason to explore, even if it does not tell you there is something there.

This is exactly why I love this series!!!

I think exploration is my favorite thing to do in game...sometime you run into the most interesting things...like that truck above cottonwood cove, for example.

Nuts, was up there today and did not bother checking the truck out. I even jumped off and climbed the cliff right beside it. lol 2mo then..