Two decades since the Berlin Wall came down, BBC Mundo looks at walls and barriers around the world which are still standing - or have been put up - since 1989.

WEST BANK



Israel says the West Bank barrier is essential to protect itself from attack but to the Palestinians, it is an "apartheid wall".

Concrete controversy



NORTHERN IRELAND



Designed as a temporary measure to keep fighting Protestant and Catholic communities apart, many "peace walls" are stills standing.

Troubled communities



SAUDI ARABIA



The most powerful economy in the Gulf is building one of the longest, most high-tech security fences in the world, at a cost of $3bn.

High-tech frontier



CEUTA AND MELILLA



Residents of Spain's north African enclaves live behind towering fences, designed to keep out would-be illegal migrants trying to reach Europe.

European gateway



CYPRUS



Built after the 1974 war, the no-man's land between Greek and Turkish Cypriots on the island remains under UN control.

Divided island



PAKISTAN-IRAN



Baluchistani communities are divided by Iran's barrier on its border with Pakistan, intended to keep out smugglers and migrants.

Communities split



RIO DE JANEIRO



Brazil says the walls are to protect the forest from growing shanty towns, but critics say they are an attempt to hem in the city's poor.

'Poverty barrier'



US-MEXICO



The US spends millions of dollars on a vast fence and surveillance operation along its southern border to try to keep illegal migrants out.

Operation Guardian



INDIA-PAKISTAN



The mined and heavily guarded border between India and Pakistan is one of the most volatile frontier regions on the planet.

Volatile frontier



KOREAN BORDER The heavily guarded "De-militarized Zone" (DMZ) between North and South Korea remains a symbol of Cold War on the peninsula. Cold War remnant

WESTERN SAHARA Morocco's wall of sand in the Sahara desert is an attempt to keep out the Sahrwari people, who also claim the territory as their own. Desert sands

BOTSWANA-ZIMBABWE Botswana's hopes the extensive fence will protect its valuable livestock from disease, but Zimbabwe says its real purpose is to keep people out. Disease barrier





