Walls, doors, a roof and most likely an exorbitant admission fee. Oh, and many items and exhibits teaching people about the history of science. The exhibits vary from museum to museum.
The Metropolitan Museum in New York has many interesting displays. They have exhibits on ancient history as well as science exhibits that are more modern.
The museum Science World is in Vancouver, British Columbia, Canada. It is located at the end of False Creek and features many interactive exhibits and displays.
There are many Michael Jackson exhibits.
The Israel museum is said to have 26 exhibits starting with artifacts, and ending with ancient people's biographies, existing back to 200B.C
Every Museum of Natural History has many mammal exhibits.
The metropolitan Museum of Art in NYC has many exhibits. Some of the exhibits that they have include Egyptian Art, European Sculpture, Medieval Art, The American Wing, Greek and Roman Art. The museum also has special exhibits that change often.
If one were to visit the Fernbank Museum of Natural History, one would be able to visit many exhibits. Some of these exhibits include the Dinosaur Plaza, the Giants of the Mesozoic or the Reflections of Culture.
De Young Museum is a museum within the fine arts district of San Fransisco. They have many different kinds of exhibits but many focus on artwork and artists.
If you are looking to find museum exhibits of contemporary sculptures, then there are many websites online which will show you some. One of the best places to go would be on the Grounds For Sculpture website.