In a tiny corner of one of Earth’s harshest, coldest regions, an unlikely force continues to shift and change the landscape: an active volcano.

Acacia Johnson, a photographer and naturalist who works as a guide for Quark Expeditions in Antarctica, says the island’s name comes from the very narrow, easy-to-miss opening into the caldera, known as Neptune's Bellows.

“The island appears solid from the outside, until that opening is found and it is discovered to be a flooded caldera,” she says. “It's an amazing passage to sail through, with walls of rock rising up on both sides. There is also a submerged rock right in the middle of the channel that has caused many a shipwreck.”

Since its discovery, the island has played