(MarketWatch) — When John Geber stumbled upon one of Australia’s oldest wineries on a morning bike ride in 1998, he saw a giant Bavarian-style chateau in shambles. All the windows were broken, there were gaping holes in the roof and pigeon droppings were everywhere. He found out the property, in the Barossa Valley in southeastern Australia, was for sale. Realizing it was a national treasure laid to waste, he bought Chateau Tanunda the very next day. He spent the next decade pumping millions of dollars into restoring the long, rectangular brick building and reviving its 220-acre vineyard, home to more than 100-year-old Shiraz and Grenache vines.