Complex sentence: The only remains of old St. Joseph are some tombstones in the Old St. Joseph, or'Yellow Fever', Cemetery in present-day Port St. Joe-coincidentally located very close to the current office of the county health department.
Split into simpler sentences: The only remains of old St. Joseph are some tombstones in the Old St. Joseph, or'Yellow Fever', Cemetery in present-day Port St. Joe. Which, ironically, is located very close to the current office of the county health department.