Is it aristolochia? Dutchman's pipe?

Google search will give you these images:

Here is a link that might be useful: dutchman's pipe

I believe Ipomea alba (Calonyction aculeatum) is the scientific name for Moonvine...the plant with large white and very fragrant flowers that only blooms in the evening.
The vine has heart shaped leaves and is easy to grow. Another wonderful tropical plant with a deliciously scented flower that blooms only at night is Brunfelsia americana or Lady of the Night. It grows like a small bush (to 5') with heavenly fragrant white flowers that later turn to pale yellow. Both would be perfect for your Moon Garden.