The Kerepesi Cemetery is Budapest's oldest cemetery, and one of the oldest fully intact cemeteries in Hungary. Many famous Hungarians are buried here. It's located near the Keleti train station so it's easy to reach. It's huge, so if you want to visit it and really get a good look around, plan on spending half a day, or at least several hours.
Once inside the main gates, the cemetery spreads out in all directions, however there is a main road that runs directly in front of the gate towards the back of the cemetery. For travel weary visitors there is a WC right inside the gate, and then you may proceed on to visit the cemetery's chapel, which is fairly unremarkable. What is remarkable about this cemetery is the beautiful and lovingly carved tombs. Some of them are simple markers, some are statues, and some are huge edifices. You can see the graves of people such as the poet Jozsef Atilla, the actress Blaha Luzja, and the mausoleums of famous statesmen such as Batthyanyi Lajos, Deak Ferenc, and Kossuth Lajos. You may purchase a map at the entrance for a very small fee which will guide you to the tombs of notable personages, but I think it's fun to just wander through the grounds at random and see what you come across.
The cemetery is filled with beautiful horse chestnut trees. In the fall these turn yellow and cover the ground. It's a lovely, well-preserved green space in the city center, and so it's a wonderful place to go for reflection, for a walk, or just to see some green grass and pretty trees. It's much like a huge park in that respect. Wandering through it is certainly fascinating and is a very pretty walk as well.
One of the most thought-provoking parts of the cemetery is the memorials to those who were killed by the Soviets during the 1956 Uprising. You will note that many of the dead were quite young, 18, 19, or in their early twenties. It's a sobering reflection on Hungary's modern history. For people interested in history, and who also might want a lovely walk in a gorgeous park, this is a Budapest landmark you should certainly include on your itinerary if you have the time.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.