For the adventurous who don’t mind climbing winding staircases, ducking pipes, and exploring small spaces where astronomers work, this behind-the-scenes tour is your ticket!

This is not for kids under 15 or for anyone concerned with physical demands. Not wheelchair accessible. 1hr 45mins.

This is the only tour where you get to see the world’s largest indoor elevator in action, go into the astronomy plate vaults, enter a reflector telescope dome,  walk through the semi-subterranean machine shop and darkrooms, and visit more peculiar places. This tour typically happens only once per week on Friday mornings.

Get tickets here