During my 5-day trip to Korea, I was able to visit 3 of the Joseon tombs.
The first was Jeongneung (in Seoul, close to Sungshin Women's University subway station). I was a little upset because the park does not allow access to the tomb itself; I wanted to see the stone statues closer but there was a fence surrounding the elevated mound. Though I have to agree that this park is set in a quiet forested area away from the city noise.
The second one I visited was Seolleung (also in Seoul) and fortunately, the park management allows visitors to get closer to the tomb. The walk in the forest is a very pleasant experience.
The last was Yungneung/Geolleung in Hwaseong City, Gyonggi-do province. My Korean friend and I decided to see this place as we had extra time after visiting Hwaseong Fortress in Suwon.
All in all, the trip to these royal tombs is a wonderful experience. There are 40 inscribed on the list; 4 are found in Seoul. But I guess visiting one or two will suffice as they all look (almost) the same.
Compared to the Qing and Ming dynasty tombs in China, the Joseon tombs are smaller; but true enough, they have a special charm.