Trains are run on a similar, manual-block fashion on long, unsignaled sections of freight and passenger railroad in the country, so-called dark territory.

WSJ: PATH's Road Back Is Rocky

Not that Solstheim was short on ice and crags, but at the very least we can hope to see some serious rivalry between Nords and Dark Elves playing out across this new territory.

FORBES: Next Skyrim DLC Could Be Heading Back to Familiar Territory...

This covers territory at the top end where some other experiments have already reported tantalising hints of dark matter.

BBC: Alpha Magnetic Spectrometer to release first results