Cut each apple in half and create a cavity in each half by using a spoon or scoop. Dip each apple half in lemon water and lay them to dry on paper towels.

Heat the caramels and water in a saucepan over medium-low heat and stir until melted and smooth. Stir in cream and remove from the heat.

In another saucepan, combine the chocolate chips, sweetened condensed milk, butter, water, and vanilla. Stir over medium heat until the chocolate chips are melted and smooth, whisking if necessary. Keep warm.

Pour caramel into the dry, hollowed out apples and top with a scoop of ice cream. Drizzle with hot fudge and top with chopped nuts.