They might be graves. In Korean culture, usually the wealthy have graves that are circular with a walkway leading to them. I've seen graves like this in South Korea as well as Okinawa. During WWII, many of these grave sites on Okinawa were targeted and distroyed as suspected AAA sites. Some of the Okinawans are pissed at us to this day because of that. Not good PR when you drop a 500 pounder on the grave of someone's grandfather.
"Slow is Fast - Fast is Slow"
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Slow is Fast, Fast is Slow
Violence may not be the best option, but it IS an option
