Find out amazing facts and try some quizzes all about planet Earth, from the highest mountains to the longest rivers, the deepest oceans, and the largest deserts.

Glaciers are giant masses of ice formed by the gradual piling up of snow over hundreds of years.

6.5 miles (10.5 kilometers) up-glacier from the terminus of Bear Glacier in Kenai Fjords National Park, an ice-dammed lake fills and drains in a cycle that produces near-annual glacial lake outburst floods.

Watch for river otters, harbor seals, waterfowl, moose, black bears, and an endless cycle of tides.

The public-use dock in Glacier Bay National Park is a hub of activity.

Two hundred fifty years ago this entire area was covered with ice. Now it’s home to sea otters, humpback whales and orcas.

The Tlingit Trail follows the shoreline of Bartlett Cove from the Huna Tribal House to the Visitor Information Station and the public-use dock.

This is the view out a window on the top floor of the General Store in Kennecott, looking to the north. On the right, the historic Kennecott mill building climbs fourteen stories up the mountainside above the railroad trestle, leaching plant and power plant.

This view is from the old Dairy Barn in Kennecott, looking south to the Chugach Mountains.

The village of Apgar is the main hub of activity (on the west side of the park) throughout the summer.

To many visitors to the park, this view is their first introduction to the spectacular scenery of Glacier National Park.

This view to the northeast from the summit of Apgar Mountain provides a spectacular view of Lake McDonald and the mountains in the distance.