MS and I visited the small town of Olympos on the southern coast of Turkey (on the Mediterranean). It’s got a long history, including an old castle, and old Roman fort ruins, with many buildings fairly intact.
And as always, I try to imagine others who have been here!
There is a mountain near Olympos which has some naturally occurring natural gas vents, which have been burning for hundreds of years. We made a visit, and had a great time roasting marshmallows, and trying to light any small vents which might have been extinguished: