A hill in the middle of the town. On the top is the ruin of the old castle, and the Castle Rock Tower.
The 17 m 56 ft high observation tower on top of Castle rock, is a landmark for Tønsberg. The tower was built in 1888.
The grave of viking-queen Alvhild. The vikingship Oseberg was found here, after archaeological excavations.
Built in 1858.
Contains among other thing: viking ships, and a skeleton from a blue whale.