A-Bomb WWWMuseum, Hiroshima

http://www.csi.ad.jp/ABOMB/index.html

Fiftieth anniversary commemoration project detailing the Hiroshima and Nagasaki bombs, interviews with survivors, and exhibits from the Hiroshima Peace Park and Museum.

The Exploratorium

http://www.exploratorium.edu

Museums generally haven't translated to the Web too successfully, but this showing from San Francisco's Exploratorium is a notable exception. Some of its 650-odd interactive exhibits have adapted quite well, making it an engaging and educative experience, especially for children.

Expo Ticket Office

http://sunsite.unc.edu/expo/ticket_office.html

Jump aboard a virtual bus to tour exhibits of the Catican, Soviet archives, European exploration of the Americas, Dead Sea Scrolls, Museum of Palaeontology, and the city of Spalato. After all that, you're dropped off at the Expo restaurant for a feed of French cuisine.

Field Museum of Natural History, Chicago

http://www.addressbook.com/Chicago/Gateways/Field.html

Page through the eras in the DNA to Dinosaurs exhibit downloading movies and sound bites. Or explore Javanese masks, bats, and more. One for the kids.

Museum of Modern Art N.Y.

http://www.moma.org

If you only ever visit one modern art museum, here's a sample of what to expect when you get there.

Museums Around the World

http://www.icom.org/vimp/world.html

Directory of Web museums sorted by country.

The Natural History Museum

http://www.nhm.ac.uk

London's Natural History Museum was one of the Web's pioneering sites. it has a few science galleries that could be classed as exhibits in their own right, but most of the elaborate simply teases. It won't save you a visit, but it might convince you it's worth the trip.

UCMP Time Machine

http://ucmp1.berkeley.edu/timeform.html

Jump aboard the University of California's Museum of Palaeontology's time machine for a rocky ride through the geological eras.

Vatican Library

http://www.ncsa.uiuc.edu/SDG/Experimental/vatican.exhibit/exhibit/Main_Hall.html

Stroll through several virtual rooms in the Catican each with its own speciality such as literature, music, nature, archaeology, humanism, biology, and mathematics.

Andy Warhol Museum

http://www.warhol.org/warhol

Pittsburgh's Andy Warhol Museum hasn't put all the Pop author's works online, but you can virtually tour its physical gallery for a contents listing. Then order the book, postcard set, and t-shirt to prove you've visited.

WebMuseum

http://mistral.enst.fr/~pioch/louvre/

Famous art from Gothic right through to Pop, classical music samples, and special exhibition of medieval art, Cézanne and more to come, complete with commentary courtesy of the Encyclopaedia Britannica. Used to be called Le Louvre, until lawyers stepped in.