Answer:
One country that has an isthmus located within its borders is Panama. Panama is a country located in Central America that is bordered by Costa Rica to the west and Colombia to the east. It is connected to South America by the Isthmus of Panama, a narrow strip of land that stretches for about 80 kilometers (50 miles) between the Caribbean Sea and the Pacific Ocean.
The Isthmus of Panama has played an important role in the history and development of Panama and the surrounding region. It is the site of the Panama Canal, a man-made waterway that allows ships to pass between the Atlantic and Pacific Oceans. The canal, which was completed in 1914, is a major shipping route and has had a significant impact on global trade and commerce.
In addition to the Panama Canal, the Isthmus of Panama is also home to a diverse range of plants and animals, including many species that are found nowhere else in the world. It is an important ecological corridor that links the forests of Central and South America and supports a wide range of biodiversity.