Behold! Hell has burst forth and legions of demons are looking for Dick Cheney, their long-lost uncle.
Ok, this is the result of a mining mistake in the town of Darvaz. The article says it's in Uzbekistan, though this Wikipedia article says the town is in Tajikistan. It wouldn't surprise me that there's more than one Darvaz in the world. Anyway, this will certainly make arranging the vacation a bit more troubling for Expedia. Tajikistan isn't within their purview, I'm afraid. You'll need to explore other options, like Turkish Air.