I got stuck in Lyon, France for almost six days once.
Day 2 was fun: "Captain! Just got called by operations, no parts tomorrow! Another round on your tab, no?

"
Day 3 was good, but grew a little tired of the FA drama ("First year in the airline business and your first irregular operation, ma'am? Oh, it's not? Why so glib... Oh, you have stuff to do.... ahhh... none of us do.")
Day 4 was pretty good because the weather improved and I discovered a lot of interesting pubs and sights. Also found an amazing restaurant.
Day 5, I was about ready to go a little, shall we say, "Lord of the Flies", but sitting around with cold, fresh beer in Vieux Lyon soothed my attitude.
Day 6, flew empty back to the US. No pax, doors open, station manager loaded up the plane with 5 choices of meal per crewmember and some local specialities and had a wonderful time. Discovered that an empty 757 with winglets, normal takeoff thrust, will hit 12,000 feet before you finish the phrase, "Gear upOLY CRAP (expletive) E-Ticket ride"