Hong Kong International Airport is seeking investors to fund the majority of a HK$100 billion ($12.8 billion) expansion, which includes two marinas, as one of the world’s busiest transit hubs looks to boost visitation.

Fresh from completing a HK$141.5 billion third runway expansion to handle more flights, the airport plans to turn into a tourist destination in its own right as part of broader efforts to revive Hong Kong’s flagging economy. About HK$30 billion of infrastructure will by funded by the airport itself, with the rest sought from the private sector, the authority announced Thursday.