This restaurant in Spain hasn't closed its doors since 1725
Please note: This post was written some time ago (6 years ago). My perspectives, knowledge, and opinions may have evolved significantly since then. While the content might still offer valuable insights, I encourage readers to consider it in the context of its publication date.
Via BoingBoing:
Botin Restaurant in Madrid has been in operation for 293 years, a world record. The owners claim the oven hasn’t once gone out. The house specialty is roast suckling pig, which is 25 euros.