Cheap$kate: The best FREE events this week in New York City

'The Stadium' by Jon Plasse

Relive the glory days of "The House That Ruth Built" at this photo exhibit that focuses on the final days of Yankee Stadium between 2004-2008. In "The Stadium," photographer Jon Plasse showcases photos that highlight his frequent visits to Yankee Stadium, along with images from the site's demolition in 2009. The exhibit runs through April 19 with an opening reception this Wednesday evening from 6 to 9. (Opens Wednesday, Tues.-Sun., 11 a.m.-7 p.m., FREE, Bosi Contemporary, 48 Orchard St., 212-966-5686, bosicon temporary.com)Lecture

'Saving Ancient Egypt, One Tweet at a Time: How Social Media is Saving One of the World's Oldest Civilizations'

What could Ancient Egypt and social media possibly have in common? At this lecture by archaeologist and social media activist Dr. Monica Hanna, you'll find out how Hanna's efforts to expose the looting problem in Egypt have resulted in the recovery of stolen objects. Hanna also created and maintains Egypt's Heritage Task Force, a social media outlet for reporting attacks on heritage sites. (Thursday, 6:30-8 p.m., FREE, registration required, The Cooper Union Rose Auditorium, 41 Cooper Square, 212-353- 4195, cooper.edu)

Health

More | Fitness Health & Wellness Expo

Find out what it takes to get marathon ready at the More | Fitness magazines Health & Wellness Expo, taking over the Metropolitan Pavilion this Friday and Saturday. The two-day event will feature exhibitor booths, speakers and training sessions, special sales, food and product samplings, beauty touch-ups and health screenings. Scope out the yoga classes and skin care tips and hang around to meet Olympians Deena Kastor and Dara Torres. Check the site for details on times. (Friday, 11 a.m.-7 p.m., Saturday, 10 a.m.-5 p.m., FREE, Metropolitan Pavilion, 125 W. 18th St., morefitnesshalf.com)

Art

'Greek Monsters'

From Medusa to Cerberus to minotaurs, monsters play a big role in ancient Greek mythology. Thanks to Greek design group Beetroot, you now have a chance to scope them out up close and personal at this new exhibit at the Onassis Cultural Center NY. The FREE exhibit, which features contemporary interpretations of characters from classical mythology through sculpture, bas-relief and paintings, runs through July. (Opens Friday, 10 a.m.-8 p.m. daily, FREE, Onassis Cultural Center NY, 645 Fifth Ave., 212-486-4448, onassisusa.org)