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Video
Could You Survive This 77-Mile Triple Marathon? (04:31)
What It Takes to Master North Americas Tallest Mountain (02:08)
Roswell's Bizarre Aircraft Boneyard (02:16)
Sponsor Content: Discover Your Own "DC Cool" Moment in the Nation's Capital (01:42)
Sponsor Content: This Is American Cruise Lines (03:39)
Sponsor Content: American Cruise Lines (00:15)
This Is Actually America's First Small Town (02:53)
The Breathtakingly Beautiful Town of Carmel, California (01:51)
See D.C.s Cherry Blossoms in Less Than a Minute (01:00)
Mount Rushmore Was Supposed to Look Very Different (03:56)
How Did Michelangelo Complete the Sistine Chapel in Such a Short Time? (02:03)
Danger Lurks in a Roman Latrine (01:59)
Google Street View Angkor (01:25)
Ketchum, Idaho: Hemingway's Sunny Home Away from Home (04:08)
Sedona, Arizona's Mysterious Energy Field (01:56)
Massachusetts: Pilgrims, Provincetown and Plymouth (02:20)
How Scientists Are Tagging Reindeer to Track Climate Change (01:42)
Sponsored Video: Antarctica: Discover the Difference (00:31)
Smithsonian Journeys (00:15)
If You're a Thrill-Seeker, You Need to Visit This Place (02:56)
Why Filmmakers Love New York City (03:11)
Who Built the Great Sphinx? (04:06)
The Mysterious Roswell UFO Incident of 1947 (01:25)
Anything but Humble: Hearst Castle (03:24)
Where to Find Vampires in America (01:57)
The Secret of Nefertiti's Glare (02:02)
New York's Adirondack Park (01:41)
Best Views of the Grand Canyon (02:29)
Take a Trip to Glacier National Park (03:16)
The Volcanoes of Hawaii (02:25)
The Luxuries of the Titanic (02:56)
Astronauts Discuss Looking at Earth from Above (01:47)