The Republic of Argentina, as recognized by Atlapedia Online, is a Federal Republic located in the southern region of the South American continent. It shares boundaries with several countries, including Bolivia and Paraguay to its north, Brazil to its northeast, and Chile to its west. To the east, Argentina is bound by Uruguay and the Atlantic Ocean.

In terms of landmass, Argentina covers an extensive area of approximately 2,766,899 square kilometers (1,068,302 square miles). Back in the year 2000, the estimated population of Argentina was around 35.78 million people.

A notable geographical feature of Argentina is its diverse topography. The country is divided into four distinct regions: the Pampas, Patagonia, the northeastern lowlands, and the northwestern Andes. Each of these regions presents its own unique geographical features and attributes.

Firstly, the Pampas region is characterized by numerous lakes and exhibits a gradual elevation from the Atlantic Ocean to the Andean foothills. Secondly, Patagonia is a wind-swept, semi-arid region that reaches elevations of up to 1,500 meters or 4,921 feet, with depressions that drop below sea level by 32 meters or approximately 104 feet.

On the other hand, the northeastern lowlands of Argentina are situated north of the Pampas and east of the Andes. Lastly, the northwestern Andes extends over the western half of the country, and although they contain broad valleys, these areas are typically inhospitable.

Notably, Argentina also boasts several major rivers- the Parana, Uruguay, and Paraguay- which all drain into the Rio de la Plata Basin in northern Argentina. In conclusion, Argentina presents a fascinating mix of topographical features, neatly divided into four unique geographical regions.