Abernathy Spring is a mineral spring located in Polk County, 2.8 km (1.75 mi.) east of the unincorporated comm...

The Antoine River rises from a confluence of streams in the Ouachita Mountains of Pike County, just west of Am...

The Arkansas River originates high in the Sawatch Range of the Rocky Mountains near Leadville, Colorado, and i...

Located in southeast Arkansas, Bayou Bartholomew was, until the construction of railroad lines in the area in ...

Bayou Meto is a slow-moving stream that originates in northern Pulaski County at the confluence of several cre...

Beaver Lake was created by Beaver Dam in Carroll County. The lake—technically a reservoir since it was creat...

The Big Chalybeate Spring is located approximately three miles north of downtown Hot Springs (Garland County) ...

The Black River has played a significant, but shifting, role in the lives of residents of northeast Arkansas. ...

Blue Mountain Lake is a manmade lake, or reservoir, on Petit Jean River in Logan County. A portion of the lake...

Flowing from southeastern Arkansas into northeastern Louisiana, the Boeuf River is a shallow stream important ...

The Boston Mountains in north-central Arkansas are the southern portion of the Ozark Plateau geologic area. Th...

Buffalo Island is a local name given to western Mississippi County and eastern Craighead County. It consists o...

The Cache River arises near the Arkansas-Missouri border at the confluence of a few agricultural ditches and f...

The Caddo River of west-central Arkansas is known widely as the Natural State’s premier family float str...

Caves and caverns are natural underground openings large enough for humans to enter. They are primarily formed...

The Cossatot River rises in the Ouachita Mountains southeast of Mena (Polk County) and flows southward through...

Crooked Creek is a 129 km (80 mi.) Ozark highland White River tributary in Boone, Marion, and Newton counties ...

Crystal Hill is a geological formation on the north side of the Arkansas River near Murray Lock and Dam. It is...

The Current River crosses into Arkansas from Missouri at the border between Randolph and Clay counties and flo...

DeGray Dam, located about eight miles northwest of Arkadelphia (Clark County), impounds the 13,400-acre DeGray...

Numerous earthquakes occur every year throughout the state of Arkansas, but most go unnoticed. Earthquakes tha...

The Eleven Point River rises in the Ozark Mountains of Missouri near the town of Willow Springs and flows sout...

Floods are one of the most commonly occurring natural hazards in the United States. Their effects can be local...

Fourche Creek is a winding stream that flows more than twenty-four miles through southern Little Rock (Pulaski...

The Fourche La Fave River rises in the Ouachita Mountains near Boles (Scott County) and flows east-northeast f...

The Fourche River arises in Ripley County, Missouri, from the confluence of several streams and flows through ...

The Geographic Center of Arkansas Marker was dedicated on April 12, 1936, as part of the state’s first cente...

Abandoned mines play an important ecological role as temporary or permanent habitats for various biota. Many o...

The Grand Prairie is a subregion of the Mississippi Alluvial Plain (commonly called the Delta) in eastern Arka...