Trek.Today

Iceland (Icelandic: Ísland), also called the Republic of Iceland, is a Nordic island country between the North Atlantic and the Arctic Ocean. It has a population of 329,100 and an area of 103,000 km2 (40,000 sq mi), making it the most sparsely populated country in Europe. The capital and largest city is Reykjavík. Reykjavík and the surrounding areas in the southwest of the country are home to over two-thirds of the population. Iceland is volcanically and geologically active...

World is a common name for the whole of human civilization, specifically human experience, history, or the human condition in general, worldwide, i.e. anywhere on Earth. In a philosophical context it may refer to: (1) the whole of the physical Universe, or (2) an ontological world (world disclosure). In a theological context, world usually refers to the material or the profane sphere, as opposed to the celestial, spiritual, transcendent or sacred...

One World Trade Center (also 1 World Trade Center or 1 WTC; the current building was dubbed the Freedom Tower during initial basework) is the name of two buildings in Lower Manhattan, New York City. It most commonly refers to the primary building of the new World Trade Center complex, which is also the tallest skyscraper in the Western Hemisphere...

Calbuco (kahl-boo-koh; Spanish: Volcán Calbuco) is a stratovolcano in southern Chile, located southeast of Llanquihue Lake and northwest of Chapo Lake, in the Los Lagos Region, and close to the cities of Puerto Varas and Puerto Montt. With an elevation of 2,015 meters above sea level, the volcano and the surrounding area are protected within the Llanquihue National Reserve. The most recent eruption happened on April 22, 2015, followed by two smaller eruptions on April 24 and April 30...

Limestone is a sedimentary rock composed largely of the minerals calcite and aragonite, which are different crystal forms of calcium carbonate (CaCO3). Most limestone is composed of skeletal fragments of marine organisms such as coral or foraminifera. Limestone makes up about 10% of the total volume of all sedimentary rocks. The solubility of limestone in water and weak acid solutions leads to karst landscapes, in which water erodes the limestone over thousands to millions of years...

A city is a relatively large and permanent settlement. Although there is no agreement on how a city is distinguished from a town within general English language meanings, many cities have a particular administrative, legal, or historical status based on local law. For example, an article of incorporation approved by the local state legislature distinguishes a city government from a town in Massachusetts...

Chongqing (simplified Chinese: 重庆; traditional Chinese: 重慶; pinyin: Chóngqìng /tʃɒŋ ˈtʃɪŋ/; former transliteration: Chungking /tʃʌŋ ˈkɪŋ/) is a major city in Southwest China and one of the five national central cities in China. Administratively, it is one of China's four direct-controlled municipalities (the other three are Beijing, Shanghai and Tianjin), and the only such municipality in inland China...

The Derinkuyu underground city (Cappadocian Greek: Ανακού) is an ancient multi-level underground city in the Derinkuyu district in Nevşehir Province, Turkey. Extending to a depth of approximately 60 m, it is large enough to have sheltered approximately 20,000 people together with their livestock and food stores. It is the largest excavated underground city in Turkey and is one of several underground complexes found across Cappadocia...

The Pontcysyllte Aqueduct (full name in Welsh: Traphont Ddŵr Pontcysyllte) is a navigable aqueduct that carries the Llangollen Canal over the valley of the River Dee in Wrexham County Borough in north east Wales. Completed in 1805, it is the longest and highest aqueduct in Britain, a Grade I Listed Building and a World Heritage Site...