I'm pretty sure there's one in Hoover Dam,at the offices.

Not to worry. The guys over at Achievement Hunter are here to help you. 
 
  

• Mt. Charleston Snow Globe – Jacobstown / In the lodge, search the entrance and reception area. This Snow Globe is sitting on a curved desk by some terminals.
• Mormon Fort – Old Mormon Fort / Julie Farkas has an office inside a tower at the fort. The Snow Globe is on top of a bookcase here.
• Test Site – Lucky 38 Casino / Head to the cocktail lounge and look for the cash register. It’s across from the entrance. The Snow Globe is behind the register.
• The Strip – Vault 21 / After you access Sarah’s locked bedroom, grab this Snow Globe off of the table between the two beds.
• Nellis AFB – Nellis Air Force Base / Pete’s makeshift museum holds this Snow Globe. It’s on a table in the corner under a mural.
• Hoover Dam – Hoover Dam / Search the visitor center for a terminal near two curved desks. The Snow Globe can be found on a desk here.
• Goodsprings – Goodsprings Cemetery / Near the water tower is a patch of upturned soil by a small, rectangular grave marker. The Snow Globe is sitting in front of the marker.

Thanks for the list!

Unfortunately we can't access youtube or most gaming websites here in Afghanistan. :(

It must be kind of neat playing new vegas in Afghanistan, you already live in a really hot climate. So playing a game based in a desert while living in a desert must make for a really immersive experience. 

thanks

there's snow globes in this game?

What is the purpose of snow globes in this game?  I know the bobbleheads had a purpose, but I don't know what the snow globes do for you.