(Editor’s note: A Gwinnett couple recently returned from a Viking cruise on the Douro River in Portugal — and came home with a surprising new appreciation for one of the world’s most unusual natural materials: cork.”—eeb
By Tom Ferrin
SUWANEE, Ga. | Our journey began with a brief stay in Lisbon, followed by a bus ride to Porto, where the cruise embarked. The route wound through the heart of Portugal’s port-wine region — mile after mile of steep vineyard terraces rising above the river. Port wine is produced exclusively in the Douro Valley, and tastings accompanied the trip from start to finish.
But the unexpected highlight wasn’t wine at all. It was cork.
Most travelers know cork as a simple wine-bottle stopper. Few realize that Portugal is the world’s leading producer of cork — and that it comes from the bark of the cork oak tree, a remarkable species found primarily in the Iberian Peninsula.
Cork trees take 25 years before their first harvest, known as “virgin cork,” which is too dense and rough for wine stoppers. A second harvest comes nine years later. But it is only after the tree reaches 43–45 years old does it produce the finest quality cork. The trees themselves may live 180 to 250 years.
Cork’s properties explain why it has been valued for centuries. It is:
- waterproof and naturally antimicrobial;
- lightweight (about 90 percent air);
- elastic and compressible;
- fire resistant;
- chemically inert and hypoallergenic; and
- an excellent thermal and acoustic insulator.
Even more impressive, cork is one of the most recyclable natural materials on earth. It can be ground, shaped, shredded, and remolded repeatedly without losing its essential qualities.
Modern Portugal turns cork into much more than bottle stoppers. Travelers now find cork handbags, hats, wallets, jewelry, coasters, flooring, and even art — durable, attractive, and environmentally friendly.
The cruise also included an excursion to Salamanca, Spain — a UNESCO World Heritage site known for its cathedrals, monasteries, and the oldest university in Spain, founded in 1218.
One unexpected personal connection to the cork industry made the experience even more meaningful. Years ago, a writer built a functioning sailboat out of wine corks and sailed it down the Douro River. His book about the adventure, titled Cork Boat, has long been a family favorite, and seeing the cork forests in person brought that story to life.
The only regret of the trip was not having more time in Porto before the flight home. But the biggest takeaway was simple: never throw away a wine cork.
For those who collect them, there are local drop-off points in the Atlanta area where corks can be recycled and turned into new products, a small way to support one of Portugal’s most sustainable industries. Or, with some inspiration and a lot of work you could build your own Cork Boat and sail it down the Chattahoochee River.
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