A week in Porto and Douro Valley with layovers in Lisbon and Frankfurt

Diane and I take a week long trip to explore Porto, Portugal and the Douro Valley. We also intentionally booked a long layover in Lisbon on the way out and Frankfurt, Germany on the way home so we could further explore.
We did a lot of wine tasting and touring. We explored the local food. We took in the beautiful architecture. And, we learned a bit about the history of where we were.