52 events on december 20 on the BIG City Calendar!

Heads up at Eastern State — Halloween Nights returns for a 35th season, select nights Oct 2 – Nov 7 — five haunted houses, The Crypt doubled in size, a new After Dark VIP Tour. Final weekend Nov 6–7 is Holiday Havoc. source

Heads up in #holidays — Made in Philadelphia Holiday Market opens at Dilworth Park Nov 13, thru Jan 1 — free, seven days a week. Christmas Village opens Nov 21 with a preview weekend Nov 21–22. Visit Philly

Heads up at the Academy of Music — Opened 1857 and modeled on La Scala — the oldest opera house in the U.S. still used for its original purpose. Seats up to 2,600. About the Academy

Heads up at Queen & Rook — Memberships from $20/month or $180/year — the 2,500-game library any day, plus a monthly quest with prizes. Reserve to guarantee a seat; normal time limits apply. Family $40 covers five; arcade $50. Membership info

Heads up at the Arden — “Topdog/Underdog” Oct 29 – Dec 13. Pay-what-you-choose final dress rehearsal Wed Oct 28 at 7pm; Teen Night Nov 21, $15 tickets for ages 13–18. Topdog/Underdog

Heads up in #theatre — Visit Philly's fall guide picks 30+ can't-miss shows — updated Sep 8. Visit Philly

Heads up at The Met — Built by Oscar Hammerstein I, opened Nov 17, 1908 with “Carmen.” Reopened Dec 3, 2018 after a $56 million renovation. The Met's history

Heads up at the Forrest — TKTS Philadelphia sells 30–50% off select shows within 72 hours of curtain — in person only, at the Independence Visitor Center. Visit Philly

Heads up at the Kimmel — The Kimmel Center turns 25 this December — more than 10 million people through the doors since it opened in December 2001. 25 years of the Kimmel

Heads up at the Walnut — “The Addams Family” thru Nov 1. HalloWeek: mezzanine seats $28 on Oct 28; Kids Night Oct 29, one free ticket for 17-and-under per full-price adult (code ADDAMS); Oct 31 at 7pm, every seat $35. HalloWeek details

Heads up at Quintessence — “Pippin” previews $30–40, 18-and-under $35, $10 in-person rush an hour before curtain; theatre-industry tickets $15 with code INDUSTRY15. Ticket prices

Heads up at the Fillmore — The Inquirer Food Fest, Sat Nov 14, 11am–6pm — second year; two half-day tastings or an all-day pass. Visit Philly