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The Trans Alaska Oil Pipeline running on refridgerated support to stop oil heat melting the permafrost,Mount Hayes (4116m) and the Alaska Range in the background, Alaska, USA

Dawn mist in autumnal colours and hunters cabin closed for the winter, Kenai Peninsula, Alaska, USA, North America

Trans Alaska oil pipeline across taiga through Alaskan Range carried on insulated ground piles, Alaska, USA

Taylor Highway, gravel road through pine forest only opens summer three months into 40 Mile goldfields area, E. Alaska, USA, North America

Commercial fishing boat and small forested islands, rare summer sun, Sitka Sound, Sitka, Baranof Island, Southeast Alaska, United States of America, North America

Muskeg, tundra wetland, with lakes and pine forest, Glenallen, Alaska, United States of America (U.S.A.), North America

Griggs volcano overlooks Valley of Ten Thousand Smokes filled by ash in 1912 eruption of Katmai, Katmai Volcano National Park, Alaska, USA, North America

Old copper mine buildings, preserved national historic site, Kennecott, Wrangel Mountains, Alaska, USA, North America

Wooden houses on small forested islands, clearing morning mists, Sitka Sound, Sitka, Northern Panhandle, Southeast Alaska, United States of America, North America

Valley of Ten Thousand Smokes with ignimbrite of 1912 eruption, Griggs volcano behind, Katmai National Park, Alaska, USA, North America

Crescent Boat harbour with beautiful wooded mountains and town of Sitka, rare sunny day, summer, Baranof Island, Alaska, United States of America, North America

Crescent Boat harbour with beautiful wooded mountains and town of Sitka, rare sunny day, summer, Baranof Island, Alaska, United States of America, North America

Fishing boat, clearing morning mists, Sitka Sound, Sitka, Northern Panhandle, Southeast Alaska, United States of America, North America

Boat travels through small forested islands, clearing morning mists, rare Summer sun, Sitka Sound, Sitka, Southeast Alaska, United States of America, North America

Fishing boats, harbour, beautiful mountains, clearing mists, Sitka, Baranof Island, Northern Panhandle, Southeast Alaska, United States of America, North America

Crescent Boat harbour with beautiful wooded mountains and town of Sitka, rare sunny day, summer, Baranof Island, Alaska, United States of America, North America

Red bearberry on trundra shelf above Dalton Highway north of Atigun Pass, Dietrich River valley, Brooks Range, Alaska, USA, North America

Commercial fishing vessel, forested snow-capped mountains, rare evening sun, Sitka Sound, off Baranof Island, Sitka, Alaska, United States of America, North America

Commercial fishing boat and small forested island, rare summer sun, Sitka Sound, Sitka, Baranof Island, Southeast Alaska, United States of America, North America

Clearing morning mists, Sitka Sound, Sitka, Northern Panhandle, Southeast Alaska, United States of America, North America

Forested mountains and small boat, from Sitka Sound, rare evening sun, summer, Sitka, Northern Panhandle, Southeast Alaska, United States of America, North America

Forested mountains and wooden houses, from Sitka Sound, rare evening sun, summer, Sitka, Northern Panhandle, Alaska, United States of America, North America

Glacial iceberg detail from ice calved off the South Sawyer Glacier in Tracy Arm, Southeast Alaska, Pacific Ocean, United States of America, North America

Glacial iceberg detail from ice calved off the LeConte Glacier, Southeast Alaska, Pacific Ocean, United States of America, North America

Adult brown bear (Ursus arctos) foraging along the shoreline at Pavlof Harbor on Chichagof Island, United States of America, North America

Scenic views from Tracy Arm-Fords Terror Wilderness area in Southeast Alaska, United States of America, North America

Guests from the Lindblad Expeditions ship National Geographic Sea Bird in Glacier Bay National Park, UNESCO World Heritage Site, Southeast Alaska, United States of America, North America

Guests from the Lindblad Expeditions ship National Geographic Sea Bird during Zodiac operations in Tracy Arm, Southeast Alaska, United States of America, North America

Flightseeing through peaks of Mt. Denali and the Alaskan mountain range, Alaska, United States of America, North America

Northern lights (Aurora borealis) illuminate the night sky along the horizon behind mountains near Anchorage, Alaska, United States Of America.

Adult tufted puffin (Fratercula cirrhata) on the water at South Marble Island, Glacier Bay National Park, Alaska, United States of America

Glacial iceberg detail from ice calved off the Sawyer Glacier in Tracy Arm, Southeast Alaska, United States of America

Glacial iceberg detail from ice calved off the Sawyer Glacier in Tracy Arm, Southeast Alaska, United States of America

Glacial iceberg detail from ice calved off the Sawyer Glacier in Tracy Arm, Southeast Alaska, United States of America

Glacial iceberg detail from ice calved off the LeConte Glacier near Petersberg, Southeast Alaska, United States of America

Glacial iceberg detail from ice calved off the Sawyer Glacier in Tracy Arm, Southeast Alaska, United States of America

Glacial iceberg detail from ice calved off the LeConte Glacier near Petersberg, Southeast Alaska, United States of America

Glacial iceberg detail from ice calved off the LeConte Glacier near Petersberg, Southeast Alaska, United States of America

Sawyer Glacier calving from Tracy Arm-Fords Terror Wilderness area in Southeast Alaska, United States of America

Scenic view from Tracy Arm-Fords Terror Wilderness area in Southeast Alaska, United States of America

Scenic view from Tracy Arm-Fords Terror Wilderness area in Southeast Alaska, United States of America

Partial View of Mount Denali (Mount McKinley) in Denali National Park, Alaska, United States of America

Riding the bus along the 92 mile-long road into Denali National Park, Alaska, United States of America

View of the Polychrome Mountains from lookout point on the park road inside Denali National Park and Preserve, Alaska, United States of America

Float planes used to fly guests in to the Brooks Lodge and campground in Katmai National Park near Bristol Bay, Alaska, United States of America

Adult brown bear (Ursus arctos) foraging for salmon at the Brooks River, Katmai National Park, Alaska, United States of America

Adult brown bear (Ursus arctos) foraging for salmon at the Brooks River, Katmai National Park, Alaska, United States of America

Adult brown bears (Ursus arctos) foraging for salmon at the Brooks River, Katmai National Park, Alaska, United States of America

Holgate Glacier, Harding Icefield, Kenai Fjords National Park, Alaska, United States of America, North America

Scenery, Homer, Harding Icefield, Kachemak Bay, Kenai Fjords National Park, Alaska, United States of America, North America

Holgate Glacier, Harding Icefield, Kenai Fjords National Park, Alaska, United States of America, North America

Glacial iceberg detail from ice calved off the Sawyer Glacier in Tracy Arm, Southeast Alaska, United States of America

Glacial iceberg detail from ice calved off the Sawyer Glacier in Tracy Arm, Southeast Alaska, United States of America

Glacial iceberg detail from ice calved off the LeConte Glacier near Petersberg, Southeast Alaska, United States of America

Glacial iceberg detail from ice calved off the LeConte Glacier near Petersberg, Southeast Alaska, United States of America

Glacial iceberg detail from ice calved off the LeConte Glacier near Petersberg, Southeast Alaska, United States of America

A view in Glacier Bay National Park and Preserve, UNESCO World Heritage Site, Southeast Alaska, United States of America, North America

Complete rainbow over the calm waters of Inian Pass in southeast Alaska, Pacific Ocean, United States of America, North America

Scenic view of Glacier Bay National Park and Preserve, UNESCO World Heritage Site, Southeast Alaska, Pacific Ocean, United States of America, North America

Glacial iceberg detail from ice calved off the Sawyer Glacier in Tracy Arm, Southeast Alaska, United States of America

Moraine Creek (River), Katmai National Park and Reserve, Alaska, United States of America, North America

Arctic squirrel (Citellus parry), Denali National Park, Alaska, United States of America, North America

Moss covered rocks at water's edge, Prince William Sound, Alaska, United States of America, North America

Glacier Bay National Park, viewed from Princess Star Cruise Ship, Alaska, United States of America, North America

Boulder and common fireweed (Epilobium angustifolium), Matanuska Glacier, Alaska, United States of America, North America

Flightseeing through peaks of Mt. Denali and the Alaskan mountain range, Alaska, United States of America, North America