Science
DNA nanotechnology
Flora
(Four Mile Run, Other Virginia, Maryland, New York, West Virginia, Other locations)
Fauna
(Huntley Meadows Park, Other locations)
California
Caltech
(Olive Walk, San Pasqual Walk, Moore Walk, California Avenue, Interiors)
Transit
Other
Massachusetts
Charles River bridges
East Boston
Other
District of Columbia and vicinity
Bridges
(Potomac River, Anacostia River, Rock Creek, Four Mile Run, Cameron Run, Difficult Run, Accotink Creek, Pohick Creek)
Transit
Other District of Columbia
(St. Elizabeths Hospital, Walter Reed Army Medical Center, Other locations)
Other Northern Virginia
(Arlington, Alexandria, Fairfax County, Prince William County, Warrenton)
Other Maryland
(Montgomery and Prince George's Counties, Ellicott City)
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New York and vicinity
New York City
Northern Nassau County
(Historic homes, Other buildings, Bridges and transit, Cemeteries)
Central Nassau County
Southern Nassau County
(Massapequa, Long Beach, Jones Beach)
Suffolk County
Upstate New York
New Jersey
Cincinnati and vicinity
Bridges
(Ohio River, Great Miami River)
Other Cincinnati
(Downtown, Clifton, Cincinnati)
Cincinnati suburbs
(Ohio, Kentucky and Indiana)
Dayton
West Virginia
South Branch Valley
(Moorefield, Petersburg)
High Alleghenies
Lower Monongahela River
Kanawha and New River Valley
(Bridges and dams, Other Kanawha River, Hinton, Other New River, Greenbrier River)
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Other United States
Rhode Island and vicinity
Delaware
Shenandoah Valley
(Harpers Ferry, Winchester, Front Royal)
Central Virginia
Hampton Roads
South Carolina
(Greenville, Charleston)
Columbus
(Bridges, Other)
Tennessee
(Downtown Nashville, Music Valley and The Hermitage, Memphis)
Spokane and Northern Idaho
(Bridges, Other Spokane, Other Coeur d'Alene)
Other locations
(East Coast, Midwest and Upland South, West)
International
North America
Iceland
Ireland
(Dublin, Kilkenny Castle, Other Kilkenny)
France
(Paris, Nancy)
Denmark
(Copenhagen, Kronborg Castle, Other Helsingør)
Other Europe
South Africa
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