Is it possible to back to Zion Canyon after completing Honest Hearts?

[Alumi]

Hello, i need to go back to Zion Canyon to get Snow Globe.
When i was doing this DLC i didn't know that there's any snow globe in it.
Can i go to Zion Canyon one more time, take snow globe and go back to Mojave Wasteland? I need it for achievment (i have all except this one :P)

[talgaby]

The only DLC area you cannot return to is the Sierra Madre in Dead Money. You can return to Zion any time, I like to do that to stock up on crafting plants form time to time.

[Alumi]

Thanks, got snow globes achievments ;)