Craters of extinct and passive volcanoes are circular depressions in the ground caused by ancient volcanic activities. It is typically a basin, circular in form within which occurs a vent (or vents). Because of their inaction these craters are mostly suffered many changes caused by atmospheric and human factors. Unusual and beautiful volcanic cones, traces of human activity, lush vegetation and colorful crater lakes are the main reasons why many tourists visit these extraordinary destinations.
# Diamond Head, Hawaii, USADiamond Head is the name of a volcanic tuff cone on the Hawaiian island of Oʻahu. Its name was given by British sailors in the 19th century, who mistook calcite crystals embedded in the rock for diamonds. This crater is a defining feature of the view known to residents and tourists of Waikiki alike. The volcanic tuff cone is a United States State Monument. While part of it serves as a platform for antennas used by the U.S. government and is closed to the public, the crater's proximity to Honolulu's resort hotels and beaches makes the rest of it a popular destination.
# Kelimutu, IndonesiaKelimutu is a volcano, close to the small town of Moni in central Flores Island of Indonesia. The volcano contains three striking summit crater lakes of varying colors. Tiwu Ata Mbupu (Lake of Old People) is usually blue and is the westernmost of the three lakes. The other two lakes, Tiwu Nuwa Muri Koo Fai (Lake of Young Men and Maidens) and Tiwu Ata Polo ( Enchanted Lake) are separated by a shared crater wall and are typically green or red respectively. The lake colors vary on a periodic basis. Subaqueous fumaroles are the probable cause of active upwelling that occurs at the two eastern lakes.
# Crater in Rocas Bainbridge,Galapagos Islands,Ecuador This wonderful islet is located in Rocas Bainbridge - a chain of volcanic cones off the southeastern coast of Santiago Island, Galapagos.
Turquoise lake nestled in the crater of this extinct volcano is a shallow saltwater lake. It is a meeting place for a large number of flamingos, who come here to feed.
# Xico, MexicoXico volcano sits at the extreme southern end of the Mexico City megalopolis. For a geologically significant chunk of time, this area was underwater, drowned by Lake Chalco. The lake began to dry out in the 1300s, and Aztec fishermen settled along its coastline hereabouts. In the nineteenth century, the government drained the lake entirely; the fishermen were awarded communal land grants and told to become farmers.
# Molokini, Hawaii, USAMolokini is a crescent-shaped, partially submerged volcanic crater which forms a small islet located in Alalakeiki Channel between the islands of Maui and Kahoʻolawe, part of Maui County in Hawaiʻi. It has an area of 23 acres (93,169 sq m), a diameter of about 0.4 miles (0.6 km), and is located about 2.5 miles (4.0 km) west of Makena State Park and south of Maʻalaea Bay. It is a popular tourist destination for scuba diving, snuba and snorkeling.
# Seongsan Ilchulbong, South KoreaSeongsan Ilchulbong, also called ‘Sunrise Peak’, is an archetypal tuff cone formed by hydrovolcanic eruptions upon a shallow seabed about 4 thousand years ago. Situated on the eastern seaboard of Jeju Island and said to resemble a gigantic ancient castle, this tuff cone is 182 meters (600 ft) high, has a preserved bowl-like crater and also displays diverse inner structures resulting from the sea cliff.