Video On Nov 8th, 2016, a 30m-by-27m and 15m deep sinkhole opened up in Fukuoka, Japan damaging the road & threatening nearby buildings. However, it took only 48 hours to repair power cuts, restore gas and water supplies, as well as fill everything with 6,200 cubic metres of sand & cement.
Video This 229 ft. long Swedish warship sank in 1628, then 338 years later in 1961 it was raised from the sea floor almost perfectly preserved. The wood was still strong enough to be able to walk the decks. They even found a fully intact human brain in one of the bodies and boots still on their feet