With around 65,000 drawings and more than a million old master prints, the Albertina is a mightily impressive collection of art. Located in the largest Habsburg residential palace, the collection also includes more modern works - including two significant collections of Impressionist and early 20th-century art, and temporary exhibitions. Also on display are 21 exquisite Habsburg state rooms, spread over two floors of the palace.
The Museum of Illusions in Vienna is dedicated entirely to tricking its visitors' senses with physics-defying optical illusions and mind-bending puzzles. The museum is accessible to people of all ages and makes a great family day out with equal parts fun and learning.