Monitor and Merrimac buttes are two neighboring formations sitting at the edge of a plateau,
overlooking Sevenmile Canyon, which is northwest of Moab.

The 600 feet high monoliths has been so named because of their resemblance to the two Civil War ironclad ships.
The Merrimac (left) was the Confederate ship called “the Virginia” by the southern forces. The Monitor (right) was the Union ship sent to destroy the Merrimac.
Buttes were formed from Entrada Sandstone, as a result of the continued erosion of tabletop-like mesas.
Erosion reduces the size of the mesa until it is a jagged brick of rock.

You can see them in this WikiMapia aerial view < http://wikimapia.org/#lang=pl&lat=38.658605&lon=-109.736059&z=16&m=b&v=2

Through the canyon runs Highway 313, the route to Dead Horse Point State Park.