Mexico
Situated in the Americas at about 23° N and 102° W, Mexico comprises much of southern North America or Middle America. Physiographically, the lands east of the Isthmus of Tehuantepec including the Yucatán Peninsula (which together comprise around 12% of the country's area) lie within Central America; geologically, the Trans-Mexican Volcanic Belt delimits the region on the north. Geopolitically, however, Mexico is commonly not considered a Central American country.
Mexico's total area is 1,972,550 km², making it the world's 14th largest country by total area, and includes approximately 6,000 km² of islands in the Pacific Ocean (including the remote Guadalupe Island and the Islas Revillagigedo), Gulf of Mexico, Caribbean Sea, and Gulf of California. On its north, Mexico shares a 3,141 km border with the United States. The meandering Río Bravo del Norte (known as the Rio Grande in the United States) defines the border from Ciudad Juárez east to the Gulf of Mexico. A series of natural and artificial markers delineate the United States-Mexican border west from Ciudad Juárez to the Pacific Ocean. On its south, Mexico shares an 871 km border with Guatemala and a 251 km border with Belize.

Belize
Belize is located between the Hondo and Sarstoon Rivers, with the Belize River flowing down through the centre of the country. The north of Belize consists mostly of flat, swampy coastal plains, in places heavily forested. The flora is highly diverse considering the small geographical area. The south contains the low mountain range of the Maya Mountains. The highest point in Belize is Doyle's Delight at 3,688 ft. (1,124 m.). The Caribbean coast is lined with a coral reef and some 450 islets and islands known locally as cayes (pronounced "keys"), forming the approximately 200 mile (322 km) long Belize Barrier Reef, the longest in the Western Hemisphere and the second longest in the world after the Great Barrier Reef. Three of the four coral atolls in the Western Hemisphere are also located off the coast of Belize. Belize is also the only Central American country without a coast on the Pacific Ocean.The climate is tropical and generally very hot and humid. The rainy season lasts from May to November and hurricanes and floods are frequent natural hazards.

Guatemala
Guatemala is mountainous, except for the south coastal area and the vast northern lowlands of Petén department. Two mountain chains enter Guatemala from west to east, dividing the country into three major regions: the highlands, where the mountains are located; the Pacific coast, south of the mountains; and the Petén region, north of the mountains. All major cities are located in the highlands and Pacific coast regions; by comparison, Petén is sparsely populated. These three regions vary in climate, elevation, and landscape, providing dramatic contrasts between hot and humid tropical lowlands and colder and drier highland peaks. Volcán Tajumulco, at 4,220 meters, is the highest point in Central America.Guatemala HighlandsThe rivers are short and shallow in the Pacific vertient, larger and deeper, such as the Polochic which drains into Lake Izabal Río Dulce, (Motagua) and Sarstún that forms the boundary with Belize in the Caribbean and the Gulf of Mexico vertient (Usumacinta, which forms the boundary between Chiapas, Mexico and Petén and its tributaries such as La Pasión and San Pedro.
Guatemala has long claimed all or part of the territory of neighbouring Belize, formerly part of the Spanish colony, and currently an independent Commonwealth Realm which recognises Queen Elizabeth II as its Head of State. Guatemala recognized Belize's independence in 1990, but their territorial dispute is not resolved. Negotiations are currently underway under the auspices of the Organization of American States and the Commonwealth of Nations to conclude it