Lake Tota

               Lake Tota (Lago de Tota) is the largest lake in Colombia, located in the east of Boyacá department. It is the source of the Upia River which flows into the Orinco River basin. It had a surface of 55 km². Lake Tota had 5 islands: San Pedro, Santa Helena, Santo Domingo, Cerro Chico, La Custodia. 
               Laguna de Tota Natural National Park is located in the immediate vicinity of the lake, in the municipality of Cuitiva. It extends over approximately 3.5 ha on heights between 3100 and 3200 m². Many people believe in "The monster of Lake Tota ". The monster of Lake Tota is an aquatic course, known, among other reviews-like "diabloballena".

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Orinoco

               Orinoco river (Río Orinoco) is one of the longest rivers in South America at 2,140 km (1,330 mi). Its drainage basin, sometimes called the Orinoquia, covers 880,000 square kilometres (340,000 sq mi), with 76.3% of it in Venezuela and the remainder in Colombia. At its mouth, the Orinoco forms a wide delta that branches off into hundreds of rivers and waterways that flow through 41,000 km² (16,000 sq mi) of swampy forests.        
                 The main tributaries of Orinoco are: Apure, Arauca, Atabapo, Caroní, Casiquiare canal, Caura, Guaviare, Inírida, Meta, Ventuari, Vichada. It's crossing the following cities: Ciudad Bolívar, Ciudad Guayana, Puerto Ayacucho, Curiapo, Tucupita. 

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Guaviare River

             Guaviare River (Río Guaviare) is a tributary of the Orinoco located in Colombia. The Guaviare has its source in two other rivers, the Ariari and the Guayabero, which in turn have their own sources in the eastern part of the Andes. At 1,497 km (930 mi) long, it is the longest tributary of the Orinoco and is navigable for 630 km (390 mi) of its total length. 
             The Guaviare is considered the border between the Llanos and the Amazon Rainforest. The original inhabitants of the basin of Guaviare, the following indian tribes: Guayabero Tinigua, Sikuani, Nukak, Piapoco and Puinave. A modern bridge crosses Guaviare River near San Jose del Guaviare, capital of the department of Guaviare. 

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Rio Japurá

             The Japurá River or Caquetá River is a river about 2,816 kilometres (1,750 mi) long say 2,414 km) rising as the Caquetá River in the Andes in the Southwest of Colombia. It flows southeast into Brazil, where it is called the Japurá. The Japurá enters the Amazon River through a network of channels. It is navigable by small boats in Brazil. 
              Main Japura River's tributaries are: Apaporis-Tunia, Caguán, Yarí, Cahuinari, Purué, Miriti Paraná, Orteguaza. The river is home to a wide variety of fish and reptiles, including enormous catfish weighing up to 91 kg (200 lb) and measuring up to 1.8 metres (5.9 ft) in length, electric eels, piranhas, turtles, and caimans.

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La Guajira Desert

              La Guajira Desert (El Desierto de la Guajira) is a desert located in the northernmost part of Colombia, 610 km (380 mi) north of Bogota, in the La Guajira Department, covering most of La Guajira Peninsula including Venezuelan territory. The area holds immense coal reserves, exploited in a zone known as El Cerrejon. 
              The area is also home to the indigenous Wayuu people and a variety of desert flora and fauna. In La Guajira Desert is located The National Natural Park of Macuira (El Parque Nacional Natural Macuira) which is a a tropical oasis. The park covers 25,000 hectares (62,000 acres) in La Guiajira’s only mountain chain, and ranges in altitude from 0 to 450 metres (1,480 ft).

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Medellin

            Medellín is the second-largest city in Colombia. It is in the Aburrá Valley (Valle de Aburrá), one of the more northerly of the Andes in South America. To 2012, it has a population of 2.7 million. In February 2013, Medellín was chosen as the most innovative city in the world due to its recent advances in politics, education, and social development.

           The main landmarks are The Coltejer Building (Edificio Coltejer), University of Colombia (Universidad Nacional de Colombia - UNALMED), Medellín branch, La Raza Monument, The Intelligent Tower (El edificio inteligente), Plaza Mayor, Plaza Botero, Central Library of Pontifical Bolivarian University (Universidad Pontificia Bolivariana), Museum of Antioquia (Museo de Antioquia), Museum El Castillo, Candelaria Church (Iglesia de Nuestra Señora de la Candelaria), San Ignacio Square (Plazuela San Ignacio), La Alpujarra, Medellin's Metropolitan Cathedral (Catedral Metropolitana de Medellín)  and The Metropolitan Theatre (Teatro Metropolitano de Medellín).

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