A high-powered group of advisers set up by the Andrews government secretly reconsidered a rail link to Melbourne Airport as one of several "strategic investments" to boost Victoria's tourism prospects.

Almost two years after the idea of train connection between Tullamarine and the CBD was shelved when Labor came to office, a cabinet-in-confidence document reveals it was briefly put back on the table as part of deliberations by a reference group chaired by infrastructure tsar Sir Rod Eddington.

The government has been told to improve the visitor experience at the Twelve Apostles and other key attractions. Credit:Jen White/Illawarra Mercury

The group – appointed by the government to work on a new tourism strategy – also warned that tourism infrastructure investment across the state lacked vision, resulting in "below par" facilities or investors being thwarted from entering or staying in the market.

"Melbourne has adequate capacity to service current levels of visitors to the city. However, if it is to maintain its position as a desirable destination for tourists and international students, and an attractive host city for major events, strategic investments must be made," says the document, obtained by The Sunday Age.