Canyon in the context of "Big Raven Plateau"

A landform is a land feature on the solid surface of the Earth or other planetary body. They may be natural or may be anthropogenic (caused or influenced by human activity). Landforms together make up a given terrain, and their arrangement in the landscape is known as topography. Landforms include hills, mountains, canyons, and valleys, as well as shoreline features such as bays, peninsulas, and seas, including submerged features such as mid-ocean ridges, volcanoes, and the great oceanic basins.

The Albanian Riviera (Albanian: Riviera shqiptare, pronounced [ɾiviˈɛɾa ʃcipˈtaɾɛ]), also popularly known as Bregu, is a coastline along the north-eastern Ionian Sea in the Mediterranean Sea, encompassing the districts of Sarandë and Vlorë in south-western Albania. It forms an important section of the Albanian Ionian Sea Coast, dotted with the villages of Palasë, Kondraq, Dhërmi, Ilias,Vuno, Himara, Pilur, Kudhës, Qeparo, Borsh, Piqeras, Sasaj, Lukovë, Shën Vasil and Nivicë-Bubari.

The riviera should not be confused with the entire coastline of the country, which includes the Ionian Sea Coast, and the mostly flat Adriatic Sea Coast in the north. The Ceraunian Mountains separate the coast from the hinterland. The area is a major nightlife, ecotourist, and elite retreat destination in Albania. It features traditional Mediterranean villages, ancient castles, churches, monasteries, secluded turquoise beaches, bays, mountain passes, seaside canyons, coves, rivers, underwater fauna, caves, and orange, lemon, and olive groves. During the classical times, 48 BC during his pursuit of Pompey, Julius Caesar set foot and rested his legion at Palasë. He continued onto Llogara Pass in a place later named Caesar's Pass.

The grade (US) or gradient (UK) (also called slope, incline, mainfall, pitch or rise) of a physical feature, landform or constructed line is either the elevation angle of that surface to the horizontal or its tangent. It is a special case of the slope, where zero indicates horizontality. A larger number indicates higher or steeper degree of "tilt". Often slope is calculated as a ratio of "rise" to "run", or as a fraction ("rise over run") in which run is the horizontal distance (not the distance along the slope) and rise is the vertical distance.

Slopes of existing physical features such as canyons and hillsides, stream and river banks, and beds are often described as grades, but typically the word "grade" is used for human-made surfaces such as roads, landscape grading, roof pitches, railroads, aqueducts, and pedestrian or bicycle routes. The grade may refer to the longitudinal slope or the perpendicular cross slope.

The Grand Canyon is a steep-sided canyon carved by the Colorado River in Arizona, United States. The Grand Canyon is 277 miles (446 km) long, up to 18 miles (29 km) wide and attains a depth of over a mile (6,093 feet or 1,857 meters).

The canyon and adjacent rim are contained within Grand Canyon National Park, the Kaibab National Forest, Grand Canyon–Parashant National Monument, the Hualapai Indian Reservation, the Havasupai Indian Reservation and the Navajo Nation. President Theodore Roosevelt was a major proponent of the preservation of the Grand Canyon area and visited it on numerous occasions to hunt and enjoy the scenery.

Mars is the fourth planet from the Sun. It is also known as the "Red Planet", for its orange-red appearance. Mars is a desert-like rocky planet with a tenuous atmosphere that is primarily carbon dioxide (CO₂). At the average surface level the atmospheric pressure is a few thousandths of Earth's, atmospheric temperature ranges from −153 to 20 °C (−243 to 68 °F), and cosmic radiation is high. Mars retains some water, in the ground as well as thinly in the atmosphere, forming cirrus clouds, fog, frost, larger polar regions of permafrost and ice caps (with seasonal CO₂ snow), but no bodies of liquid surface water. Its surface gravity is roughly a third of Earth's or double that of the Moon. Its diameter, 6,779 km (4,212 mi), is about half the Earth's, or twice the Moon's, and its surface area is the size of all the dry land of Earth.

Fine dust is prevalent across the surface and the atmosphere, being picked up and spread at the low Martian gravity even by the weak wind of the tenuous atmosphere.The terrain of Mars roughly follows a north-south divide, the Martian dichotomy, with the northern hemisphere mainly consisting of relatively flat, low lying plains, and the southern hemisphere of cratered highlands. Geologically, the planet is fairly active with marsquakes trembling underneath the ground, but also hosts many enormous volcanoes that are extinct (the tallest is Olympus Mons, 21.9 km or 13.6 mi tall), as well as one of the largest canyons in the Solar System (Valles Marineris, 4,000 km or 2,500 mi long). Mars has two natural satellites that are small and irregular in shape: Phobos and Deimos. With a significant axial tilt of 25 degrees, Mars experiences seasons, like Earth (which has an axial tilt of 23.5 degrees). A Martian solar year is equal to 1.88 Earth years (687 Earth days), a Martian solar day (sol) is equal to 24.6 hours.

The Lomonosov Ridge (Russian: Хребет Ломоносова, Danish: Lomonosovryggen) is an unusual underwater ridge of continental crust in the Arctic Ocean. It spans 1,800 kilometres (1,100 mi) between the New Siberian Islands over the central part of the ocean to Ellesmere Island of the Canadian Arctic Archipelago. The ridge divides the Arctic Basin into the Eurasian Basin and the Amerasian Basin. The width of the Lomonosov Ridge varies from 60 to 200 kilometres (37 to 124 mi). It rises 3,300 to 3,700 metres (10,800 to 12,100 ft) above the 4,200-metre (13,800 ft) deep seabed. The minimum depth of the ocean above the ridge is less than 400 metres (1,300 ft). Slopes of the ridge are relatively steep, broken up by canyons, and covered with layers of silt. It is an aseismic ridge.

The Lomonosov Ridge was first discovered by the Soviet high-latitude expeditions in 1948 and is named after Mikhail Lomonosov. The name was approved by the GEBCO Sub-Committee on Undersea Feature Names (SCUFN).

The Northern Karst Belt (Spanish: Cinturón del Carso Norteño) is a limestone karst landscape located in the northwestern region of Puerto Rico. A karst is a topographical zone formed by the dissolution of soluble porous rocks, such as limestone, with features such as mogotes, canyons, caves, sinkholes, streams and rivers, all of which are common on this region of the island. Some of the island's main rivers, including its longest (La Plata River), traverse the karst and form some of the most distinctive Puerto Rican geographical features such as the Camuy caverns. Many of these rivers feed into and are important in the formation of many marshy areas such as the Caño Tiburones wetlands.

The Morača (Montenegrin Cyrillic: Морача, pronounced [mǒrat͡ʃa]) is a major river in Montenegro that originates in the northern region in Kolašin Municipality under Mount Rzača. It meanders southwards for 99.5 km (61.8 mi) before emptying into Lake Skadar. Its drainage basin covers 3,257 km (1,258 sq mi).

In its upper flow the Morača is a fast mountain river. Just north of Podgorica it merges with its largest tributary, the Zeta, which it then cuts a rocky canyon before entering the Zeta plain. It flows through the surrounding flatland until it empties into Lake Skadar on the border with Albania. A shorter, much broader, meandering, approximately sea-level river, the Bojana, flows through the northwest corner of Albania until it drains into the Adriatic Sea at Ada Bojana.