It's widely reported that there were hundreds of kilometers of Viet Cong tunnels. However that may be hard to prove exactly, in retrospect, how long they were. OTOH a more recent source claims that there are 120 km of preserved tunnels.

More than 120 kilometers out of the 250 kilometers of the tunnels’ length has been preserved for tourism purposes.

A similar claim:

The Cu Chi Tunnels, stretching all the way to the Cambodian frontier, once boasted an impressive length of nearly 250 kilometers. Out of this, 120 kilometers have been meticulously preserved and are now open to the public.

Can this claim be verified with contemporary/peace surveys?

FWTW, Wikipedia cites a source for the 120 km figure... which doesn't actually give it. But it does give some area figures for the museum(s)/reservations. Which (after converting from hectares) seem to be only about 1-2 square km, in total. It's possible the tunnels have a high density, but this is inconclusive.

  • If someone can suggest additional tags... Nov 21, 2023 at 20:01
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    There's a 2019 page that says that only 100 meters are/were visitable by tourists [then], although that's not necessarily the same thing as much more not being preserved. Nov 22, 2023 at 3:05
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    I found the same numbers on a gov.vn page, but they seem to have gotten that from CNN, and it's not clear where they got the numbers from.
    – Laurel
    Nov 25, 2023 at 15:21
  • Most Vietnam websites e.g. this or this (Indonesian) claim that the tunnel is 250 km long.
    – C.F.G
    Nov 25, 2023 at 19:05
  • Is the question specifically about tunnels kept for tourism? Tunnels may be preserved for other purposes, maybe for storage or routing pipes/cables. There's also the question of what "preserved" means - would fencing a tunnel off count as preserving it? It's also possible that 120 km may be preserved at particular a site but substantially less can be travelled through by tourists, since you wouldn't let tourists just wander unsupervised through 120 km of tunnels.
    – Stuart F
    Nov 30, 2023 at 11:06


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