It's been one of the most popular spots for tourists and locals alike, but Bob Redell explains why today is the last day for the San Francisco Exploratorium.
San Francisco's Exploratorium is offering free admission Wednesday, for its last day at the Palace of Fine Arts before the popular science museum moves down the waterfront to Pier 15 in April.
The Exploratorium, which opened at 10 a.m., will also mark the end of its 43-year tenure at its current spot with a final ringing of its closing bell at 5 p.m., according to museum officials.
Lines were wrapping around the building by 11 a.m. as people wanted to take advantage of the free entrance and the final day at the current location.
The Exploratorium hosts more than 500,000 visitors annually and offers hands-on exhibits about biology, physics and other scientific fields.
Since 1995, the museum has also helped train about 6,400 educators.
The new Exploratorium will open at Pier 15 on April 17.
Here is the rundown of the final 90 minutes: