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Sheer rock cliff bordering Blackstone Canal and Blackstone Rive in Cumberland, Rhode Island
Autumn view of the Great Serpent Mound, the largest serpent effigy in the world, extending about 1,370 feet (420 m).  Originally though to have been constructed by prehistoric the Adena culture, scholars now think it was built by the Fort Ancient culture (1000-1650 CE), an Ohio Valley-based, mound-building society.  The Fort Ancient culture was influenced by the contemporary Mississippian culture society based along the mid-Mississippi River valley and extending as far north as the Great Lakes area.
Basalt deposits
Aerial View of the Potomac River and C&O Canal with Fall Colors at Dusk Sunset in Maryland.
Rock Cliff with Moss In Southern Illinois
Wide shot of schist outcrop on the eastern slope of Mount Tom in Connecticut, where the rocks have been estimated to be 1.3 billion years old. Schist is a metamorphic rock, formed from tremendous pressure and heat. It constitutes much of the bedrock in this area. This rock is similar to the Manhattan schist found in New York City's Central Park.
Scenic view from Akfadou forest in Bejaia, Algeria
Forest Trail in Cuyahoga Valley National Park
\
Ontario, Canada.
Entrée d'une grottes sous les bois de hourpes dans la région de thuin. Vue depuis le chemin du halage au bord de la sambre. Entrance to a caves under the woods of Hourpes in the Thuin area. View from the path of the stay at the edge of the Sambre.
Mother and child walking in the autumn forest in Catalonia, Spain.
a rocky cliff, fronted with trees
Fall color foliage hits Ashtabula County, Ohio.
Layers of rock overhanging the edge
lakeside
A snake den in the Shawnee National Forest in Southern Illinois.
Red Flag Canal, Linzhou City, Anyang City, Henan Province.\nRed Flag Canal, national AAAAA level tourist attractions, national key cultural relics protection units.\nIn the 1960s, the people of Linzhou City, under extremely difficult conditions, built a water conservancy project from the mountainside of Taihang that shocked the whole country and was called \
white tree growing on side of cliff, Zoar Valley, Cattaraugus Creek, Gowanda, New York
Gravel road leading between cliffs and a river. Sunny winter day.
Autumn landscape of the C&O Canal Towpath Trail passing between the Potomac River and forested cliffs in Maryland.
Pine Hills Nature Preserve is a quiet, three and a half mile hike in Montgomery County, Indiana.  The entrance to the nature preserve now is through Shades State Park.  It is 470 acres, and the walk is steep and crosses hazardous areas like Devil's Backbone.  It is a narrow natural bridge.  Indian Creek cut deep gorges creating four narrow backbone ridges opening to larger Sugar Creek.  I have been to Pine Hills many times, hardly seeing another visitor.  Spring was a particular nice time to travel as the Virginia Bluebells and Redbud trees were blooming.
The Ledges at Cuyahoga Valley National Park
Wide shots of the canal along the C&O Trail in Great Falls Maryland
Woodstock, Georgia. From 1928 to 1949 the Little River was used to haul rope from the Old Rope Mill.  The water was used to transport the rope to other locations throughout Georgia and destinations beyond.
Geometry of rock formations in black and white.
A classic rope strung from a tree to be used to jump in \
Forest on the Hohenstein
Aerial View of Harpers Ferry, West Virginia, Potomac River and Bridges Autumn Colors.
Free Images: "bestof:Cliff md.jpg en Cliff face from the Maryland Side towards the Visitor Center and towpath Own Rlogan2 2007-03-15 Landscapes of Maryland"
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Eucera_rosae,_F,_Face,_MD,_St_Mary's_County_2014-02-11-17.34.43_ZS_PMax.jpg
Anthophora_abrupta,_M,_Side,PG_county,_MD_2014-01-30-10.33.18_ZS_PMax.jpg
Eucera_rosae,_F,_Face_ammonia,_MD,_St_Mary's_County_2014-02-21-16.58.25_ZS_PMax.jpg
Phymata,_right_side_face,_Somerset_Co.,_MD_2016-09-15-13.35.jpg
Nomada_denticulata,_m,_face,_Charles_Co._Maryland_2016-06-27-16.19.00_ZS_PMax_UDR.jpg
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Xylocopa_viginica,_f,_face,_Prince_George's_Co,_MD_2016-10-20-18.22.jpg
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Dynastes_tityus,_f,_side_face,_MD_2016-02-24-15.16.jpg
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Bombus_variabilis,_male,_face,_Maryland_2012-08-28-16.jpg
Osmia_georgica,_m,_face,_Maryland_2016-06-27-17.52.jpg
Nomada_luteola,_m,_face,_Maryland_2016-04-16-01.26.jpg
Matala beach cliff Crete Greece.jpg
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Bombus_impatiens,_red_freak,_F,_Face,_Maryland,_Frederick_County_2014-12-05-13.59.20_ZS_PMax.jpg
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Andrena_carlini,_f,_face,_Cecil_Co._Maryland_2016-03-29-14.22.jpg
Nomada_maculata,_m,_face,_Charles_Co._Maryland_2016-06-27-16.59.jpg
Hoplitis_anthocopoides,_f,_face,_Washington_Co._Maryland_2016-03-29-17.16.jpg
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Colletes_brevicornis,_f,_face,_Pr._George's_Co._Maryland_2016-03-29-15.57.jpg
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Habropoda-laboriosa,-male,-side_2012-06-08-14.16.05-ZS-PMax.jpg
Megachile-campanulae,-male,-side_2012-06-07-15.39.59-ZS-PMax.jpg
La Peña Vieja de Arcos de la Frontera.JPG
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Andrena_wilkella,_female,_face_2012-08-09-15.28.53_ZS_PMax.jpg
Evaniid_wasp._Unknown._MD._Side_2012-09-06-16.jpg
Cricket,_face_2012-09-26-15.17.13_ZS_PMax.jpg
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Wasp,_U,_Face,_MD,_Wicomico_County,_Groundworks_Farm_2015-08-25-15.56.40_ZS_PMax_UDR.jpg
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Andrena_illini,_f,_side,_Somerset_Co,_MD_2016-03-16-12.51.jpg
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Lasioglossum-foxii,-unkown,-side_2012-07-17-16.47.23-ZS-PMax.jpg
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Philanthus_gibbosus,_female,-side_2012-07-31-20.33.16-ZS-PMax.jpg
Coelioxys-sayi,-female,-side_2012-06-07-15.12.41-ZS-PMax.jpg
Coelioxys_modesta,-male,-side_2012-07-16-18.28.04-ZS-PMax.jpg
Colletes_inaequalis,_female,_side_2012-08-10-16.jpg
Megachile-brevis,-female,-side_2012-06-15-17.54.51-ZS-PMax.jpg
Osmia_distincta,_side_2012-07-02-17.35.19_ZS_PMax.jpg
melecta_pacifica,_f,_side,_md,_pg_2015-05-14-09.54.48_ZS_PMax.jpg
Eucera_rosae,_F,_Back,_MD,_St_Mary's_County_2014-02-11-17.24.40_ZS_PMax.jpg
Eucera_rosae,_F,_Side,_MD,_St_Mary's_County_2014-02-11-17.48.24_ZS_PMax.jpg
Hylaeus_leptocephalus,_m,_side,_Dorchester_Co,_MD_2016-02-18-16.57.jpg
Coelioxys-coturnix,-female,-face_2012-07-11-15.01.08-ZS-PMax.jpg
Coelioxys-sayi,-female,-face_2012-06-07-15.04.50-ZS-PMax.jpg
Habropoda-laboriosa,-female,-face_2012-07-16-16.33.52-ZS-PMax.jpg
Coelioxys_moesta,_male,_side_2012-08-09-16.24.40_ZS_PMax.jpg
Habropoda-laboriosa,-female,-side_2012-07-16-16.40.17-ZS-PMax.jpg
Coelioxys-coturnix,-female,-side_2012-07-11-15.10.35-ZS-PMax.jpg
Megachile-frugalis,-female,-face_2012-07-10-12.18.34-ZS-PMax.jpg
Coelioxys_coturnix,-male,-left-side_2012-07-13-17.26.20-ZS-PMax.jpg
Andrena-gardineri,-female,-side_2012-07-16-16.00.21-ZS-PMax.jpg
Andrena-nuda,-female,-side_2012-08-03-17.35.01-ZS-PMax.jpg
Anthidiellum-notatum,-male,-side_2012-07-13-17.00.25-ZS-PMax.jpg
Leptinotarsa_juncta,_side,_pg_county,_md_2016-06-17-11.07.jpg
Lasioglossum_coeruleum,_F,_Face,_MD,_Talbot_County_2015-01-08-14.37.47_ZS_PMax.jpg
Lasioglossum_coeruleum,_F,_Side,_MD,_Talbot_County_2015-01-08-14.27.39_ZS_PMax.jpg
Northern_Pearly_Eye,_Side,_Beltsville,_MD_2013-10-25-10.28.43_ZS_PMax.jpg
Megachile-campanulae,-male,-side_2012-07-06-18.36.13-ZS-PMax.jpg
Melecta_pacifica,_f,_face,_Prince_Georges_county_2015-05-14-09.13.54_ZS_PMax.jpg
Bombus_terricola,_male,_face_2012-07-12-16.54.jpg
Bombus_citrinus,_Male,_Face,_Cecil_County,MD_2013-11-14-09.29.06_ZS_PMax.jpg
Heriades_leavitti,_male,_side_2012-07-06-17.56.jpg
Bombus_citrinus,_f,_face,_Talbot_Co,_MD_2016-01-07-11.35.jpg
Andrena_brevipalpis,_M,_face,_Caroline_County_2015-10-27-10.11.53_ZS_PMax_UDR.jpg
Triepeolus_concavus,_M,_face,_Dorchester_Co,_MD_2015-09-01-12.11.29_ZS_PMax_UDR.jpg
Megachile_frugalis,_female,_side_2012-07-10-12.25.jpg
Osmia_pumila,_m,_upper_marlboro,_face_2_2015-04-16-11.22.03_ZS_PMax.jpg
Osmia-bucephala,-female,-side_2012-06-08-14.46.41-ZS-PMax.jpg
Triepeolus_concavus,_M,_side,_Dorchester_Co,_MD_2015-09-01-12.34.25_ZS_PMax_UDR.jpg
Bombus_citrinus,_f,_side,_Talbot_Co,_MD_2016-01-07-12.03.jpg
Andrena_confederata,_f,_side,_Pr_Georges_Co,_MD_2016-03-16-11.44.jpg
Lasioglossum_platyparium,_f,_face,_Charles_Co.,_MD_2016-03-15-22.52.jpg
3_MARC_in_the_Snow_Photos.jpg
Heriades_carinata,_f,_side,_Prince_George's_Co,_MD_2016-04-15-22.16.jpg
Antlion,_Face_2016-03-20-17.56.jpg
Megachile_exilis,_m,_face,_Pr._George's_Co.,_MD_2016-03-16-00.05.jpg
Nomada_seneciophila,_f,_side,_md,_charles_county_2015-11-20-17.42.jpg
Nomada_seneciophila,_f,_face,_md,_charles_county_2015-11-20-17.31.jpg
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