A short limousine ride from the famous Monte Carlo casino, the Les Caravelles building enjoys a dress circle position overlooking Port Hercules - a popular place for the world's mega-rich to park their super yachts when visiting the Cote d'Azur.

According to documents filed with the Australian Electoral Commission, it is also the mailing address for Akira Investments Ltd, a generous donor to the Free Enterprise Foundation, a mysterious entity closely linked to the Liberal and National parties.

The building where Monaco company Akira Investments has its mailing address.

Given the foundation has no phone number and no website, just how a company domiciled in Monaco came to donate $200,000 last financial year - an extraordinarily large donation by Australian standards - is intriguing enough.

But just who is behind Akira Investments is also shrouded in mystery. Regulatory authorities in Monaco say there is no record of its existence. Nor does it appear in Australian company records.