We find ourselves looking for something to do that stimulates that mind and challenges the senses after a restoring summer of relaxing poolside and slowing down. Here are a few highlights of the interesting exhibits and shows you can find on any given day around DC.

Unexpected Indie Sofar concerts are hosted at secret locations across the city as part of an international movement to reconnect music with audiences, according to The Washington Post. Sign up for a date and a neighborhood, purchase a ticket or pay-what-you like. Then show up where you’re told to go the day of the concert.

How the Other Half Lives The Library of Congress has an incredible collection of images of New York’s squalid tenements by photojournalist Jacob Riis. The photos dating to the turn of the last century are on exhibit through Sept. 5 at the Thomas Jefferson Building, 10 First St. SE.

Second City in Chocolate City Chicago-based Second City improv troupe graces the Nation’s Capital this fall with a performance of “Free Speech! (While Supplies Last).” The witty, political comedy performance is billed as a “perfect antidote to campaign-news overload.” Sign me up.

Kennedy Center for Free The Millennium Stage is a favorite among DC insiders. The stage hosts free concerts. Every day. No tickets required. You’ll catch everything from Latin fusion to hip-hop to classical.

Image by Tom Finzel on Flickr.