NORTH SIDE. The University of Pittsburgh maintains the city's first observatory, built in 1902. The facility now has three telescopes and is home to the Allegheny Telescope Association. Call Mon-Fri between 10am-4pm to arrange a free tour.

NORTH SIDE. This 40,000 square foot facility houses so much, that it's impossible to list it all. Over 250 interactive exhibits include a planetarium, miniature railroad exhibit, Omnimax Theater, the USS Requin (WWII sub), and a health-science center. General Admission includes Carnegie Science Center Exhibits, UPMC SportsWorks, Buhl Planetarium, and USS Requin. Don't forget to check out the XPLOR Store on the first floor, and the River View Cafe on the ground floor.