One of the biggest balloon festivals in Europe is taking place in Bristol in the west of England, with up to 500,000 visitors expected.
Hundreds of balloons are taking off every day for each of the four days of the festival.
There are traditional mass launches - called ascents - first thing in the morning and right at the end of the day.
These balloons are taking off a bit later in the day in the dusk mass ascent.
There were worries that the weather would make it difficult, but things have improved with the recent sunshine.
This balloon is passing in front of the Clifton Suspension Bridge - a famous landmark in Bristol.
There are lots of preparations that the balloonists have to go through before they take off.
In 2000, a record 156 balloons took off at once as part of a mass ascent.