Today we woke up to a beautiful day here in Antarctica on board National Geographic Explorer.We started the morning at Port Lockroy to drop off mail at the penguin post office, the southernmost post office on Earth. We then headed to Damoy Point, where we walked to a gentoo penguin colony as seabirds and humpback whales cruised around the bay. We sailed through the stunning Lemaire Channel and were treated to incredible weather. Afterward, we tucked into Hidden Bay, where our brave explorers jumped into the icy water for our polar plunge. Back on board, we had a special Philippine Christmas dinner. It was a truly unforgettable day down here on the White Continent.