The aim of the workshop is to bring together researchers interested in realizing a giant neutrino observatory based on the liquid Argon time projection chamber technology, combining next-generation searches for proton decay and neutrino physics with natural and artificial sources. The workshop will include a visit to Pyhäsalmi – the deepest mine in Europe and one of the sites considered by the LAGUNA design study. With distances of 2300 km from CERN and approximately 7000 km from both KEK/JPARC and FNAL, the Pyhäsalmi site offers a potential optimal location for long baseline neutrino oscillation studies. The workshop aims at fostering a collaboration on medium and long term projects among interested researchers. Reviews of the current efforts taking place worldwide towards building large liquid Argon detectors will be presented.