Wasps' Nests Vespula/Dolichovespula species

Suspended Wasps' paper nest
Suspended Wasps' paper nest
Common, German and other "vespula/dolichovespula" wasp species are "social wasps" - sometimes called "paper wasps," a term also applied specifically to "polistes" species, from their habit of chewing wood to a pulp and pressing it to form intricately-layered nests. These nests, larger than a football, are often suspended from/supported on trees at varying heights (see photos above - Common Wasp), built using an already excavated hole in the ground (see below, also Common Wasps) or, as many householders know, built in a convenient roof space or similar in a building.
Common Wasps' nest
Wasps' nest underground
Common Wasps' underground nest in a field
Wasps' nest
Wasps' nest
This perfectly-formed wasps' nest was photographed by Martin Starnes.
Hornets' nest
He also photographed this hornets' nest, showing that they will also sometimes use indoor spaces.
Wasps' nest
Wasps' nest
Wasps' nest
This intricate structure built in brambles is home to a colony of Median Wasps who chewed wood to a paper paste to build the interior layers and external shell.
Median Wasps' nest
Median Wasp
The queen starts the nest in spring and her newly-hatched workers take over to finish it.