The Washington Monument can be seen through colorful fall leaves, in Washington, D.C., Oct. 20, 2013.
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The sun shines on the changing foliage along the Kancamagus Highway in Lincoln, N.H., in New Hampshire's White Mountains, Oct. 14, 2014.
Credit: Jim Cole/AP
A couple looks up at the autumn colors as they walk through trees at Sheffield Park Garden near Haywards Heath, in southern England, Oct. 20, 2014.
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Visitors view the autumn foliage of acer trees in the Old Arboretum at Westonbirt in south west England, Oct. 14, 2014.
Credit: Toby Melville/Reuters
Rain drops are pictured on a fallen autumn leaf in Vertou near Nantes, France, Oct. 21, 2014.
Credit: Stephane Mahe/Reuters
Autumn colours are reflected in a pond at Sheffield Park Garden near Haywards Heath in southern England, Oct. 20, 2014.
The leaves develop autumnal colors on the Tu Hwnt ir Bont Tearooms in Llanrwst, Wales, Sept. 20, 2014.
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The leaves of the Virginia Creeper turn deep red in Frankfurt am Oder, eastern Germany, Sept. 30, 2014.
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Leaves start to take on autumnal hues in Liverpool's Sefton Park
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Leaves start to take on autumnal hues in Liverpool's Sefton Park in Liverpool, United Kingdom, Oct. 16, 2014.
A couple takes a walk through Gorky Park with the trees in autumn foliage in Minsk, Oct. 12, 2014.
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Trees and their reflection in the river Kalmius in Donetsk, Ukraine, Oct. 13, 2014.
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With the fall colors reflected in a lake, a man fishes for bass as it rains in Jeffersonville, New York, Oct. 11, 2014.
Credit: Carlo Allegri/Reuters
Colorful fall foliage frames the village of Peninsula, Ohio, Oct. 16, 2014.
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Seven-year-old Rachel Thomas, from Glasgow, plays with autumn leaves in St. James' Park in London, Oct. 17, 2014.
Fall leaves frame a dog crossing a creek in Accord, New York, Oct. 4, 2014.
A dusting of snow is seen on the White Mountains Presidential Range, as leaves change colors, seen from Jefferson, N.H.
Credit: AP Photo/Jim Cole
Tourists ride Segways along the National Mall past colorful fall leaves in Washington, D.C., Oct. 20, 2013.
The Washington Monument can be seen through colorful fall leaves in Washington, D.C. , Oct. 20, 2013.
Autumn trees are seen behind a barn on a field outside the town of Elkins in West Virginia on October 22, 2014.
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Visitors cross a bridge at Loch Faskally on October 24, 2014 in Pitlochry, Scotland.
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A couple stops to take a picture of the autumn colors at Loch Faskally on October 24, 2014 in Pitlochry, Scotland.
A general view of Loch Fasklally on October 24, 2014 in Pitlochry, Scotland.