"I--I want to go to Godric's Hollow."
-- Harry Potter (DH16)
In disguise, Harry and Hermione visit Godric’s Hollow on Christmas Eve. First they see a statue of baby Harry with his parents (disguised to Muggles as a war memorial) and visit James’ and Lily’s graves, where they also see the Deathly Hallows symbol on Ignotus Peverell’s grave and the graves of likely relatives of their Hogwarts classmates. Then they visit the remnants of the Potters’ house, where magical gate bears a sign explaining that the ruins have been left as-is in remembrance of the Potters and the event that took their lives. The gate is also covered in graffiti, the most recent of which all wish Harry luck and encouragement wherever he is.
What seems to be Bathilda Bagshot appears, and wordlessly leads Harry into her home alone.
Harry notices that, like Dumbledore's tomb, his parents' grave markers are made of white marble. In DH24, Harry engraves a white stone at the head of Dobby's grave. -BB
The epitaph on Kendra and Ariana Dumbledore's grave, "Where your treasure is, there will your heart be also." is taken from the King James Bible, Matthew 6:21 and Luke 12:34. Harry figures that Dumbledore must have been the one to choose the epitaph. If Harry is right, Dumbledore must have been familiar with the Christian Bible.
Harry's parents' epitaph, "The last enemy that shall be destroyed is death." also comes from the Bible: 1 Corinthians 15:26. Harry doesn't make a guess about who chose this quotation.