HERE the best congresses can be organized with halls with a capacity of up to 2,000 places.
https://www.bormio.it/vialeghegrigie/1/p.jpg
https://www.livigno.sh/viasaroch/496d/p.jpg
https://www.sondrio.org/chiuro/nera/p.jpg
https://www.sondrio.org/sondrio/dellaposta/p.jpg