The future, once a source of infinite speculation, has been thoroughly ruined by spoiler-shouting time travelers. Fight back by revealing the past's scandalous secrets with today's Groupon to the Erie County Historical Society. Choose between the following options:

• For $30, you get a one-year family membership, including two adults, children, and grandchildren under age 18 (a $60 value).
• For $20, you get a one-year individual membership (a $45 value).

The Erie County Historical Society enriches contemporary minds at four different museum sites, including three history-focused museums and the Erie Planetarium. Visitors to the Museum of Erie County History can view a single-file queue of Erie time stretching from settlement days to the present.

Two well-aged homes make up the Battles Museums of Rural Life, which house seasonal exhibits and workshops that teach traditional skills such as the weaving and spinning techniques of arachnid pioneers. The Watson-Curtze Mansion, a lavish Victorian family-cage, stubbornly retains the toys, artifacts, and aged furniture original to its 19th-century owners. Stare even deeper into history's starry eyeballs at an Erie Planetarium show, which offers kids a safer way to see the stars than launching them directly into space.

Erie County Historical Society members get free admission to all four sites. Additional benefits include invitations and discounted admission to its holiday-themed events such as dinner under the stars on Valentine's Day weekend, cemetery tours, haunted carriage rides, and a vertically integrated gingerbread workshop. Members also receive a 10% discount in the history museum's gift shop and a subscription to its quarterly newsletter.