Architecture, buildings, and civil works

Keystone (architecture)

A keystone is the central wedge-shaped stone at the crown of an arch or vault, set in place last so it locks the surrounding stones into a self-supporting ring.

Khadakwasla Dam (खडकवासला धरण)

Khadakwasla Dam (खडकवासला धरण) is a composite masonry-and-earth gravity dam on the Mutha River near Pune, Maharashtra, and the main source of the city's drinking water.

Khajuraho Group of Monuments

The Khajuraho Group of Monuments, also known as the Khajuraho temples, is a collection of Hindu and Jain temples in Madhya Pradesh, India, built under the Chandella dynasty.

Khalij al-Masri (al-Khalig al-Masri, الخليج المصري), the Egyptian Canal of Cairo, remnant of the ancient Nile-Red Sea canal, reopened by Amr ibn al-As in 644 CE, filled in 1897-1898 and replaced by Port Said Street.

Khorsabad Residence J

Khorsabad Residence J: one of four dignitaries' residences (K, L, J, M) at the foot of Sargon II's palace on the Dur-Sharrukin citadel; simplified two-apartment plan, single bathroom, tentatively occupied by senior eunuchs.

Khorsabad Residence K

Khorsabad Residence K, a dignitary's palace-residence on the western citadel of Dur-Sharrukin, built under Sargon II (721-705 BC), excavated by the Oriental Institute 1929-1935, famed for a 13-metre royal wall painting found in 1934.

Khorsabad Residence M

Khorsabad Residence M, one of four dignitaries' residences (K, L, J, M) on the citadel of Dur-Sharrukin, Sargon II's capital; three suites, hilani-style wings, possible harem areas, likely male royals or courtiers.

Kiel Canal

Kiel Canal (Nord-Ostsee-Kanal, formerly Kaiser-Wilhelm-Kanal): 98.7 km German ship canal from Brunsbüttel on the Elbe to Kiel-Holtenau on the Baltic, opened 1895, the world's most-used artificial waterway, saving ships the route around Denmark.

Kiewit Corporation

Kiewit Corporation, also known as Peter Kiewit Sons, is an employee-owned construction and engineering firm founded in 1884 in Omaha, Nebraska, where it remains headquartered.

Kilcoe Castle

Kilcoe Castle, a 15th-century MacCarthy tower house on Mannin Beg island in Roaringwater Bay, West Cork, fell to English forces in 1603 and was restored 1998-2004 by owner Jeremy Irons as a private residence.

Kilkenny Castle

Kilkenny Castle is a castle in Kilkenny City, Ireland, first fortified in 1172 and the seat of the Butler family, earls and dukes of Ormond, for almost 600 years.

Kilsby Tunnel

Kilsby Tunnel is a railway tunnel on the London & Birmingham Railway near Kilsby, Northamptonshire, England, engineered by Robert Stephenson and built between 1835 and 1838.

Kimbolton Castle

Kimbolton Castle is a Grade I listed country house in Kimbolton, Cambridgeshire, England, best known as the final residence of Katharine of Aragon and remodelled by Sir John Vanbrugh.

King Abdullah Canal

The King Abdullah Canal (KAC) is Jordan's main water conveyor, a 110 km canal in the Jordan Valley built as the East Ghor Canal between 1959 and 1987.

King Fahd Causeway (جسر الملك فهد)

King Fahd Causeway (جسر الملك فهد), also known as the Saudi-Bahrain Causeway, is a 25-kilometer bridge and causeway link between Bahrain and Saudi Arabia, opened in 1986.

King Fahd Dam (سد الملك فهد)

The King Fahd Dam (سد الملك فهد) is a concrete gravity dam on Wadi Bishah in southwestern Saudi Arabia, completed in 1997 to recharge the aquifer and control floods.

King Faisal Air Base (Jordan)

King Faisal Air Base, also known as Al-Jafr Air Base, is a Royal Jordanian Air Force base near Al-Jafr in southern Jordan, built with Saudi funding.

King post

A king post is the central vertical member of a simple truss, running from the apex to the middle of the tie beam, and names the oldest truss form.

King Street Station

King Street Station is a historic railway station in Seattle, Washington, opened in 1906 and serving Amtrak and Sounder commuter trains, restored by the City of Seattle in 2013.

King's Chapel

King's Chapel is a historic church in Boston, founded in 1686 as the first Anglican congregation in Puritan Boston and housed since 1754 in a granite building designed by Peter Harrison.

King's College Chapel

King's College Chapel is the chapel of King's College, Cambridge, built between 1446 and 1515 in the Perpendicular Gothic style and renowned for the world's largest fan vault.

King's Cross fire

The King's Cross fire, also known as the Kings Cross Underground fire, was a fatal 1987 blaze at King's Cross station in London that killed 31 people.

Kingdom Centre (مركز المملكة)

Kingdom Centre is a 302-meter mixed-use skyscraper in Riyadh, Saudi Arabia, completed in 2002, housing offices, the Four Seasons Hotel, and the Al-Mamlaka mall beneath a skybridge observatory.

Kingscote (mansion)

Kingscote is a Gothic Revival house museum in Newport, Rhode Island, designed by Richard Upjohn in 1839–1841, enlarged by Stanford White in 1880–1881, and left to the Preservation Society of Newport County in 1972.

Kingston Lacy

Kingston Lacy is a country house and estate near Wimborne Minster in Dorset, England, built for the Bankes family from 1663 and now owned by the National Trust.

Kingsway tramway subway

The Kingsway tramway subway, also known as the Kingsway tram tunnel, was an underground tram tunnel in central London, opened in 1906 and closed in 1952.

Kinkaku-ji (金閣寺)

Kinkaku-ji, the Temple of the Golden Pavilion, is a Rinzai Zen temple in Kyoto, Japan, whose Golden Pavilion is covered in gold leaf on its upper two stories.

Kinzua Bridge

Kinzua Bridge, also called the Kinzua Viaduct, was a 300-foot-tall railroad trestle in Pennsylvania, built in 1882 and partially destroyed by a tornado in 2003.

Kiosk

A kiosk is a small, often free-standing structure in a public place, used as a staffed point of sale for newspapers and refreshments or as an unstaffed touch-screen terminal.