A gravitational singularity at the center of the Earth stopped time. If time slows down the closer we get to it, then we'll never get there. It's a relativistic conundrum, and the center of the Earth has an event horizon.
The Bottomless Pit
The Angel of the Bottomless Pit
Something that doesn't get discussed very often is this terrifying description of horse-sized armor-plated locusts with scorpion tails that are going to emerge from within the earth when the impact of Wormwood splits the crust open.
November 8th
The fifth trumpet/vial involves an army of horse-sized armor-plated locusts which are probably at least as terrifying as the Xenomorphs in the Alien franchise.