If it's warmer than 40ºF, drier than 80%, and clear enough to see the Moon, the dome at the Detroit Observatory in Ann Arbor will be open to the public. Don't miss a rare opportunity to look through a Victorian era telescope. 
This 19th century telescope is in a 19th century building, and you must be able to climb stairs to reach the dome. 
Get your free ticket to the dome at the door between 9 & 10 PM*.
Check the website http://lsa.umich.edu/astro/public-outreach/detroit-observatory-open-houses.html or Facebook Page (the regular feed, not this event feed) after 5 PM if there's any doubt about the weather. If Monday is poor, we’ll try gain on Wednesday evening.

*Note on June 26 (or 28) the event will start at 9:30, and tickets will be available until 10:30