Final Weekend of “WTC View”
Where/When: On Friday and Saturday at 8 p.m. at the Allens Lane Art Center (601 W. Allens Lane).
Why Go: Because this is the Philadelphia premiere of the show, which tells the story of a man who puts out an advertisement in The Village Voice for an open bedroom in his apartment, which has a view of the World Trade Center. He placed the ad on September 10, 2001. This is the final weekend of this show’s three week run.
Pricing: $18 with reservations or $20 at the door.

Historic Wingohocking Watershed Tour
Where/When: From 9 a.m. to 1 p.m. at the Wyck Historic House and Garden (6026 Germantown Ave.) on Saturday.
Why Go: Because Historian Adam Levine will lead this bus tour along the Wingohocking Creek, which, after 19th and 20th century engineers re-channeled the waters, now runs through the sewers of Mt. Airy.
Pricing: $15 for members, $17 for non-members.

Mt. Airy House Concert
Where/When: 6819 Mower St., from 7:30 to 10:30 p.m. on Saturday.
Why Go: Because these private concerts, at which reservations are required, feature up-and-coming local talents in an intimate setting. This installation will include performances by Suzie Brown and Temple student Brittany Ann. Reservations are required; to make one, email mtairyhouseconcerts@yahoo.com.
Pricing: $15 suggested donation, proceeds go to the musicians.

Free Tai Chi
Where/When: From 8 a.m. to 9:30 a.m. on Sunday at Mt. Airy USA (6703 Germantown Ave, Suite 200), through the rear entrance in the second floor conference room.
Why Go: Because Zak Zakland has practiced for 15 years and offers this free weekly class.
Pricing: Free

Spirit & Science of Water in the Wissahickon
Where/When: Meets at the Northwestern Stables (120 W. Northwestern Ave.) from 1 to 3 p.m. on Sunday.
Why Go: Because, if you’re interested in water quality, this will be a way to check out the water in the Wissahickon. History buffs will also appreciate the segment about the 19th century Wissahickon Turnpike.
Pricing: Free