Adirondack Balloon Festival (September 20-23): This is the 40th anniversary of the Adirondack Balloon Festival, the oldest and largest balloon gathering on the East Coast.

CNN: 7 breathtaking ballooning adventures

International Balloon Festival of Saint-Jean-sur-Richelieu (August 11-19): Every August, more than 125 balloonists descend on Saint-Jean-sur-Richelieu, midway between Montreal and Vermont, for the largest hot-air festival in Canada.

CNN: 7 breathtaking ballooning adventures

The estate, home to the city's Balloon Fiesta and an annual two-day music festival, could be boosted by a variety of new facilities.

BBC: Council reviews estate refurb plan

The company has already hosted the Bristol International Balloon Fiesta, Bristol's Half marathon and Bath Christmas Festival.

BBC: Bristol Harbour Festival organiser announced