London Zoo's squirrel monkeys celebrate summer holidays

With most people unable to enjoy a holiday abroad, the zoo has opened a new Travel the World adventure trail for those "staycationing" in the UK.

Visitors can pick up a zoo passport and plan their "global trip" at the zoo's on-site "travel agency."

Western lowland gorilla matriarch Mjukuu inspected bigger versions of the flags in her Central Africa-inspired Gorilla Kingdom.