Break free.

EXPLORE
Tunnels and Towers Weekend
What: The historic prison reveals off-limits areas like the guard tower and tiny underground cells.
Why: Don’t miss the TowerCam exhibit for a high-def look at the grounds from five floors up.
When: Sat. & Sun. Tours run every half hour, 10 a.m.-4:30 p.m.
Where: Eastern State Penitentiary, 2027 Fairmount Ave. (215-236-5111). Reservations (recommended) online at easternstate.org.

CHAT
Philly Theatre Casting Couch
What: Sit on a traveling red sofa for a screen test and share your views on the city’s theater scene.
Why: Local luminaries, like fashion ambassador Rakia Reynolds, drop by.
When: Thru Apr. 30.
Where: Around town.

STRETCH
PAWS Benefit Yoga Class
What: One hundred percent of proceeds from this all-levels class taught by the no-nonsense Ellen goes to PAWS.
Why: It promises to be packed, so don’t be late.
When: Fri., 6:30-8 p.m.
Where: Practice Yoga Studio, 804 S. Fourth St. (215-755-3268).

CRASH
Philly Roller Girls
What: Rough-and-tumble teams like the Philthy Britches and Broad Street Butchers kick off the season with a doubleheader.
Why: Their first intercontinental bout against London Brawling, the London Rollergirls all-stars.
When: Sat., 5-10 p.m.
Where: Class of 1923 Arena, 3130 Walnut St. (215-898-1923). Tickets online at phillyrollergirls.ticketleap.com.

Photo: John Van Horn / Courtesy of Eastern State Penitentiary