20. Alewives Eternal Return

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Alewives swim upstream in Maine's Damariscotta River to spawn, as they have for millions of years.

19. Greatest Hits

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A journey through some of the series favorite places.

18. The Terminal Basin of Mono Lake

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East of the Sierra Nevada mountains is Mono Lake, a million year old lake with limestone towers.

17. Shooter's Island of New York City

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A spy nest in the Revolutionary War, Shooter's Island is now a park and home to many bird species.

16. Okefenokee Blackwater Swamp

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Travel the black waters of the Great Okefenokke Swamp with it's tangled cypress, and alligators.

15. Desert of Wadi Rum

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Travel deep in the Jordanian desert of Wadi Rum to find ancient inscriptions.

14. The Acropolis of Athens

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The Acropolis, which includes the Parthenon, sits on a rocky outcrop above Athens.

13. Moods of Venice

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Travel from the Piazza San Marco to the Pescaria on the Grand Canal.

12. Katahdin Woods and Water

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Maine's Baxter State park in the Acadian woods, which includes Mount Katahdin.

11. Slot Canyons of Utah

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Vivid red slot canyons in Utah created by trade winds over 180 million years ago.

10. Iceland Glacier Lagoon

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Jokulsarion Lagoon is the deepest body of freshwater in Iceland, with black volcanic sands.

9. Central Park, New York

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The most visited urban park in the United States is nestled in the heart of Manhattan.

8. The Young Earth of the Reykjanes Peninsula

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The 10,000 mile long Mid-Atlantic Ridge is home sulfur springs, fumaroles and geysers.

7. Canyons of the Ancient Ones

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The ancestral Puebloan peoples settled the Mesa Verde region of Colorado as early as 550 AD.

6. The Oracle at Delphi

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Halfway up Mount Parnassus in Greece sits the famed Oracle of Delphi, built over 2700 years ago.

5. Fountains Abbey

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Walk through the ruins of a 1132 abbey built by Cistercian monks in northern England.

4. Colorado Canyons of Time

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Travel through sandstone plateaus and Gateway Canyon which were carved by rivers.

3. Nabataean Lost Kingdom of Petra

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An ancient city carved from the surrounding cliffs, Petra was the seat of the Nabataean empire.

2. Stonehenge

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Built in prehistoric Britain, Stonehenge is one of the most famous megalithic monuments in the world.

1. Cumberland Island

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Cumberland Island, home to pristine maritime forests and stunning natural beaches.

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