Bucatini is a type of long pasta with a hole through its center. You can think of bucatini as hollow spaghetti.
Spaghetti may be more well-known, but for some pasta fans, bucatini has it beat. The thick, hollow shape gives it extra surface area, so it can be simultaneously covered and filled with sauce. Bucatini is especially popular in and around Rome — it's also beloved in Naples, where it's known as perciatelli. The word bucatini comes from the Italian buco, "hole."