> When most cities build metro systems, they simply blast through rock.
I'm not sure that this is true (ignoring the bit about blasting, which hasn't been a standard way to build metro lines for a very long time, of course); there was a lot found when London's Crossrail was built, say.
(While it's not made totally clear, I assume they're mostly finding stuff building stations, not tunnels. The tunnels are ~20m below ground, but the stations have to go all the way to the surface.)
> (While it's not made totally clear, I assume they're mostly finding stuff building stations, not tunnels. The tunnels are ~20m below ground, but the stations have to go all the way to the surface.)
This is exactly right. Rome's subway is famously dug very deep (30-80 meters) so the tunnels run under the ruins, but each station requires an excavation down to tunnel depth.
bombcar 3 hours ago [-]
Blasting through rock is expensive and only done if needed - I'd suspect that most projects now are cut and cover or tunnel boring machine - both of which can also be terribly expensive (see: Seattle).
rsynnott 2 hours ago [-]
Yeah, this one looks to be TBM for most of the underground sections.
I’ve visited the Mithraeum. It’s maybe not a must see for a tourist, but great that it’s publicly available for free.
gignico 2 hours ago [-]
For reasons, I used to go to Rome quite frequently in the 2010s, and the construction of Metro C was already a meme. But now some of the stations are quite interesting indeed.
stavros 4 hours ago [-]
Thessaloniki had the same issue, and now there's a stop where you have walkways above the ruins.
As one of the cities I spend part of my life, the new metro experience is great, and how they integrated the stations into old Greek infrastructure.
I only morn the loss of jobs that could have been part of the metro, if the wagons weren't robots.
stavros 29 minutes ago [-]
That's great to hear, I've only been in it once (I prefer to cycle on the waterfront), but I hear the ticket machines still don't accept cards. Typical Greece, though it's nice that it actually works well for what it is.
pjmlp 8 minutes ago [-]
I was there now during both Easters, they do actually, the biggest problem is having different cards for metro and bus.
Actually we have the same problem in Lisbon and Porto, the cards you can top up are company specific, only the monthly subscriptions work across companies.
stavros 7 minutes ago [-]
I meant credit cards, it used to be that you can only pay cash. I agree, though, in London everything just takes credit cards so you have no dedicated ticket cards. Much more convenient.
sleepyguy 2 hours ago [-]
It's quite interesting to see how much earth is typically above ancient ruins. Cities built upon cities for 1000's of years where a street or building was once at ground level and now is 2-4 stories beneath our modern world.
While visiting Vienna, there are ruins on display in Michaelerplatz (central Old City), so cool.
argomo 2 hours ago [-]
Okay, I'll say it: is it really worth encumbering the movements of millions of people for decades in order to make a few boring history exhibits? If you want to see some the bone comb that belonged to somebody's great^100-grandmother, there are dozens of museums that already have one on display.
INTPenis 2 minutes ago [-]
They might find some important writing that can shed light on history.
hnlmorg 22 minutes ago [-]
The problem isn’t the present tense. The problem is once those artefacts are destroyed then they’re destroyed forever.
440bx 36 minutes ago [-]
Yes. I travel around the world looking for such things.
karmelapple 2 hours ago [-]
Is it encumbering? It seems like it's not at all.
gignico 2 hours ago [-]
Is it really worth? YMMV, but yes if you ask me.
Rendered at 17:00:20 GMT+0000 (Coordinated Universal Time) with Vercel.
I'm not sure that this is true (ignoring the bit about blasting, which hasn't been a standard way to build metro lines for a very long time, of course); there was a lot found when London's Crossrail was built, say.
(While it's not made totally clear, I assume they're mostly finding stuff building stations, not tunnels. The tunnels are ~20m below ground, but the stations have to go all the way to the surface.)
Really, any old city, anytime you build anything you may find something. For instance, here's a supermarket with bonus Viking ruins in Dublin: https://www.atlasobscura.com/places/aungier-street-lidl-arch...
This is exactly right. Rome's subway is famously dug very deep (30-80 meters) so the tunnels run under the ruins, but each station requires an excavation down to tunnel depth.
Some photos of the "before" here:
https://www.thessalonikiguide.gr/metro-thessalonikis-mia-arx...
I only morn the loss of jobs that could have been part of the metro, if the wagons weren't robots.
Actually we have the same problem in Lisbon and Porto, the cards you can top up are company specific, only the monthly subscriptions work across companies.
While visiting Vienna, there are ruins on display in Michaelerplatz (central Old City), so cool.