Rock-climbing gyms take off around Boston

Over the past three months, rock-climbing gyms have opened in Somerville and Watertown, proof of the activity’s growing popularity. Get a look at the two new gyms – Brooklyn Boulders in Somerville and Central Rock Climbing Centers in Watertown.

Pictured: Matt Pare of Somerville tried to figure out a bouldering route at Brooklyn Boulders in Somerville.

Brooklyn Boulders boasts of having the longest indoor bouldering wall in the world.

There’s original artwork painted on the walls at Brooklyn Boulders.

A look at detail of belaying rope at Brooklyn Boulders.

Bonnie Denis of Medford climbed a wall at Brooklyn Boulders.

David King navigated a wall at Brooklyn Boulders.

Pictured is Central Rock Climbing Centers in Watertown.

A determined Mimi Lin of Boston tried to figure out a route at Central Rock Climbing Centers.

Business was booming at Central Rock Climbing Centers.

David King scaled a wall at Brooklyn Boulders.

Katie Price of Boston watched her friend Mimi Lin, also from Boston, as the latter tried a route at Central Rock Climbing Centers.

Central Rock Climbing Centers also has cardio equipment.

Joey Campos of Boston attempted a bouldering route at Central Rock Climbing Centers.

Multiple people scaled walls at Central Climbing Centers in Watertown.

Brooklyn Boulders has 25,000 square feet of climbing terrain .