The Germanic National Museum (Germanisches National Museum) is a private museum celebrating the culture, technology and crafts of Germany from prehistoric times through to the present, it boasts a million exhibits. It is a cluster of quaint buildings, from a 13th century monastery to one built in 1993 by Israeli architect Dani Karavan. You'll find Dürer, Vischer, and Stoss here, along with medieval armor and musical instruments. The museum is huge and it is best to get a list of exhibits and pick the ones you want to see.
Museum of Transportation (Verkehrsmuseum) Here you'll find a scale, working model of the "Adler" - Europe's first train (1835) and some of the track it once ran on. There are wonderful train coaches here as well.
The Rail and Post Museum (Deutsche Bahn und Post Museum) inside the Verkehrsmuseum has a terrific stamp collection (over 200,000 from all over the world) for avid collectors.
Toy Museum Located in a grand house on Karlstrasse, this is the most popular museum for kids. You'll see mechanical toys, wooden and paper and tin toys, dolls and doll houses, and a collection of children's books that date back hundreds of years.
There are many churches of historic and architectural importance. St. Sebald's Church, a few blocks from the Durer house, named for the city's patron saint, is filled with works by Nuremberg artists, including St. Sebald's bronze tomb sculpted by Peter Vischer's in 1519. Head over to St. Lawrence's, with its beautiful stained glass rosette in the nave and the wood carving by Stoss "Angelic Salutation" which hangs from the vaulted ceiling. Over by the Handwerkerhof you can see more beautiful stained glass windows in St. Martha's Church. Or check out the burial sites of Durer, Sachs, and other famous locals in the cemeteries of St. Johannis and St. Rochus.
The medieval Town Hall is worth a pause, especially for all those ghastly dungeons below.