Ruins is a term used to describe the remains of man-made architecture: structures that were once complete but which have fallen into a state of partial or complete disrepair, due to lack of maintenance or deliberate acts of destruction. Natural disaster, war and depopulation are the commonest root causes, with many structures becoming progressively derelict over time due to long-term weathering and scavenging.

There are famous ruins all over the world, from ancient sites in China, the Indus valley and Judea to Zimbabwe in Africa, ancient Greek, Egyptian and Roman sites in the Mediterranean basin, and Incan and Mayan sites in the Americas. Ruins are of great importance to historians, archaeologists and anthropologists, whether they were once individual fortifications, places of worship, houses and utility buildings, or entire villages, towns and cities. Many ruins have become UNESCO World Heritage Sites in recent years, to identify and preserve them as areas of outstanding value to humanity.

Cities in ruins

Entire cities have also been ruined, and some occasionally lost completely, to natural disasters. The ancient city of Pompeii was completely lost during a volcanic eruption in the 1st century CE, its uncovered ruins now preserved as a World Heritage Site. The city of Lisbon was totally destroyed in 1755 by a massive earthquake and tsunami, and the 1906 San Francisco earthquake left the city in almost complete ruin.

Deliberate destruction

Following World War II, a number of European historic buildings fell into ruin as a result of taxation policies, which required all structures with roofs to pay substantial property tax. The owners of these buildings, like Fetteresso Castle (now restored) and Slains Castle in Scotland, deliberately destroyed their roofs in protest at, and defiance of, the new taxes. Other decrees of government have had a more direct result, such as the case of Beverston Castle, in which the English parliament ordered significant destruction of the castle to prevent it being used by opposition Royalists.

Relics of steel and wooden towers

As a rule, towers built of steel are dismantled, when not used any more, because their construction can be either rebuilt on a new site or if state of construction does not allow a direct reuse, the metal can be recycled economically. However sometimes tower basements remain, because their removal can sometimes be expensive. One example of such a basement is the basement of the former radio mast of Deutschlandsender Herzberg/Elster.