One of my cycling partners worked (probably still does) in a cemetery in England. He cycled to work every day, and of course part of his route went through that cemetery.
As a result of his job, he had an interest in cemeteries -- how people were buried, who the people were, the history of the cemetery, and the history of the community which the cemetery told. So ... when we rode, he and I visited a lot of cemeteries.
When I visited England, he showed me several of the cemeteries there, and of course we cycled to them ... and into them ... and through them. No one ever expressed any sort of displeasure with our being there.
He came to see me in Winnipeg ... and cycled out to all the cemeteries in the area. He cycled right onto the cemetery lot, sought out the caretakers, and had some great conversations with them. None were offended that he had dared to come onto the cemetery property with the bicycle.
We cycled in Australia together for three months, and we visited a lot of cemeteries ... on our bicycles!
Most cemeteries are connected with churches, and therefore are public places. Often the ministers or priests of the church, or caretakers of the cemeteries, are more than willing to welcome people into them, and to talk about them.
I don't have any of my cemetery photos online, but I do have a few of me, my bicycle, old churches, and headstones.
As the others have mentioned ... if you do ride through a cemetery, do so respectfully. Check to make sure that you are allowed to ride there. Chat with the caretakers. Take some time to take a look around the place. And enjoy the ride.