Is this a world record? I don't even want to know! An abandoned house in San Sebastián de la Gomera, Spain, was investigated by police after calls from neighbors. Inside, they found a wasp nest that almost filled a room!
Experts have examined the nest, which is said to be 21'9” in length, and say the common type of wasp found in gardens would never normally build a nest of this size.
They believe it must be an invasive species of wasp which had migrated from Africa.
The Canary Islands are less than 100 kilometres from Morocco by water.
You can almost imagine the wasps, finding that this was the most wonderful place for a nest ever because no one bothered them and it never rained, and then deciding that they'd never leave to build new nests. Link -via Arbroath
The largest wasp nest ever recorded was found on a farm at Waimaukau, New Zealand, in April 1963. Despite being composed of wood scrapings mashed up with saliva into a papier-mâché like substance, it was so heavy that it had fallen from the tree in which it had been hanging onto the ground, where it had then split into two. When whole, it measured 3.7 m (12 ft 2 in) long, and was 1.75 m (5.25 ft) in diameter and approximately 5.5 m (18 ft) in circumference. It had probably been constructed by introduced German wasps (Vespula germanica).
source: http://www.guinnessworldrecords.com/world-records/10000/largest-wasp-nest