Recommendations for La Rioja region, Spain
I was 3 weeks ago in Rioja (the last of 5 trips to the region)
All recommendations shown are very good, but maybe a bit expensive some of them (like Riscal hotel)
If you have 1 Day I´d suggest:
Lopez Heredia in Haro. I believed the oldest in Haro, great tunnels, wine... and interesting historical facts that explain how wine culture developed in Rioja.
In Briones (less than 10km from Haro) Vivanco museum. You can have lunch there with views to the vineyards or go to the restaurant Los calados, set at an old village winery.
Take the road to Elciego to enjoy views of Riscal hotel (the winery is not so special after all). The vineyard landscape is really good in this road. Then drive to Laguardia. I´d suggest you visit one of the old wineries in Laguardia (family run like Sampedro or el Fabulista) or a very modern one like Ysios or Campillo (walking distance).
I got my wineries booked at this site (I link the english version) Easier than phoning or emailing wineries.
For hotels, Los Agustinos in Haro is a good option, or Villa de Laguardia in Laguardia... or Viura (similar style to Riscal but half the price)...
I hope this helps. Many more options are available for longer trips, but one day is one day (2 wineries + nice lunch should be enough.. and be careful if you are driving!)