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Glacial lakes the colour of gemstones in Canada’s Rockies, at the heart of a World Heritage mountain landscape 400 km long.
Two billion years of Earth history laid open by the Colorado River — a mile deep, ten miles across, and five driving hours from rim to rim.
More than half of the planet’s active geysers, a caldera 75 km long, and the last wild bison that never stopped roaming.
3 places · Banff National Park · Grand Canyon · Yellowstone
