Rising straight out of the icy waters of Alaska’s Inside Passage, Glacier Bay National Park is one of the most dramatic landscapes on Earth — a place where towering tidewater glaciers calve directly into the sea, humpback whales feed just offshore, and land that was buried under ice a few centuries ago is now blanketed in temperate rainforest. It’s a park still actively rewriting its own geography, and these 25 facts show just how wild that transformation has been.

1) Glacier Bay National Park and Preserve spans roughly 3.3 million acres, making it bigger than the entire state of Connecticut.

2) In 1992, the park was named a UNESCO World Heritage Site, part of a massive 24-million-acre binational protected complex.

3) That World Heritage designation links Glacier Bay with Wrangell-St. Elias National Park in the U.S. and Kluane and Tatshenshini-Alsek parks in Canada — the first binational entry ever added to the World Heritage List.

4) The park was first protected as a national monument on February 26, 1925, and wasn’t upgraded to full national park and preserve status until December 2, 1980.

5) Less than 300 years ago, the bay that gives the park its name didn’t exist at all — it was buried under a single massive river of ice.

6) Since roughly 1750, that glacier has retreated nearly 60 miles, one of the most dramatic documented glacial retreats anywhere in the world.

7) Glacial ice looks blue because the dense ice absorbs red wavelengths of sunlight, leaving only blue light to reflect back to your eyes.

8) Ice that calves off the park’s tidewater glaciers today can be 75 to 200 years old by the time it hits the water.

9) The park’s highest point, Mount Fairweather, tops out at 15,320 feet — and the U.S.-Canada border actually runs right across its summit.

10) There’s no entrance fee to visit Glacier Bay National Park.

11) There are no roads connecting Glacier Bay to the outside world — most visitors arrive by cruise ship, plane, or boat through the small town of Gustavus.

12) Long before European explorers arrived, Glacier Bay was the ancestral homeland of the Huna Tlingit, who were forced from their valleys when the glacier rapidly advanced during the Little Ice Age.

13) In 2016, the Huna Tlingit and the National Park Service dedicated the Xunaa Shuká Hít, or Huna Tribal House, a hand-carved cedar clan house in Bartlett Cove flanked by two 20-foot totem poles.

14) Naturalist John Muir explored and wrote about Glacier Bay in the late 1800s, helping draw the scientists and travelers who would follow.

15) Ecologist William Skinner Cooper led the early 20th-century campaign that eventually got the bay protected as a national monument.

16) More than 1,000 glaciers are scattered across the park, with over 50 of them officially named.

17) The park’s most famous tidewater glaciers, Margerie Glacier and Grand Pacific Glacier, draw scientists and visitors alike to watch them calve into the sea.

18) Glacier Bay contains five distinct ecosystems: wet tundra, coastal forest, alpine tundra, glaciers, and alpine meadows.

19) Despite its icy name, much of the park’s coastal land is covered in temperate rainforest full of Sitka spruce, western hemlock, and yellow cedar.

20) Alpine tundra takes over above roughly 2,500 feet in elevation.

21) The park is home to about 300 plant species, 40 mammal species, and 200 bird species.

22) Glacier Bay and the neighboring Icy Strait are world-class summer feeding grounds for humpback whales, known here for spectacular bubble-net feeding and breaching.

23) A preserved humpback whale skeleton, recovered after a fatal ship collision, is on display near Bartlett Cove.

24) The park’s waters have helped bring back once-endangered Steller sea lions and American peregrine falcons.

25) As the glacier retreated over the centuries, the Huna Tlingit renamed the changing landscape again and again — one stretch of water was called “Bay in Place of the Glacier,” describing exactly what the retreating ice left behind.

From ice that’s older than the United States itself to whales that return every summer to feed in its cold, nutrient-rich waters, Glacier Bay proves that a landscape can be both ancient and constantly, visibly new. Few places on the planet let you watch geologic time unfold in real time quite like this one.

A personal note: I first saw Glacier Bay in 1996 from the deck of a cruise ship, and it’s stuck with me ever since. One of these days I want to go back — but this time I’d rather stay at the lodge and actually wake up there instead of just passing through.

Address: Bartlett Cove, Gustavus, AK 99826
Website: https://www.nps.gov/glba/index.htm
Video: https://www.youtube.com/watch?v=1vNC_RuQOtM