There are two gates that allows people to enter and exit these gates cannot be opened withought the guards because the gaters are opened by their chakra. Ninja of iwagakure may however enter and exit through the walls if they are skilled enough to do so.
these are what the guards look like:
the gates(doors):
Posted: Sun May 25, 2008 5:43 pm
Juusenbi stared at the copper gates and itched her sewn on clothing, a sweat running down her head, "There was something I was supposed to do here, mmm but... I can't remember what it was..."
Dark Lord Youmi Vice Captain
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Evan Umera
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Posted: Thu Jun 26, 2008 9:35 pm
"Does it really matter what you do here? The end result will be the same, death." Evan's voice echoes in Juusenbi's head.