This archaeological museum has a reasonable collection of artefacts from all over Bali, and most displays are in English. The exhibits in several small buildings include some of Bali's first pottery from near Gilimanuk, and sarcophagi dating from as early as 300 BC – some originating from Bangli are carved in the shape of a turtle, which has important cosmic associations in Balinese mythology.
The museum is about 500m north of the Bedulu junction, and is easy to reach by bemo or by bicycle. It's a sleepy place and you'll get the most out of it if you come with a knowledgeable guide.