TBC, there are quite a few objections to the Alcubierre drive, as discussed at the link. Still, it's striking IMO, and one wonders exactly what the Einstein equations will allow that naive intuition would consider "impossible".
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There's a solution to the Einstein equations which works something like a hyperdrive: https://en.wikipedia.org/wiki/Alcubierre_drive … Unf it's not clear it can be made physical - it has an unusual & probably unphysical stress-energy tensor. There's also more, ahem, conventional solutions like wormholeshttps://twitter.com/paulg/status/1122993861301764096 …
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