• The Charles River flows 80 miles from Hopkinton to Boston Harbor. It’s navigable for 10 miles, from Watertown to the harbor.
• The Watertown Dam to Boston Harbor — the “Lower Charles” — is one of the busiest recreational river segments in the world, with jogging paths, sports fields + concert performance facilities.
• Boston’s longest river is quite slow moving, averaging speeds of ~368 cubic ft per second. To compare, the Connecticut river flows at 16,180 cubic ft per second.

• Boston Pops Fireworks Spectacular | Tuesday, July 4 | 8-11 p.m. | Hatch Memorial Shell, 47 David G. Mugar Way, Boston | Free | Gates open at 12 p.m. for the holiday tradition with music from the Boston Pops + a fireworks display over the Charles River at ~10:30 p.m.
• Independence Day Celebrations | Tuesday, July 4 | 9 a.m.-12 p.m. | Various locations | Free | Start your Fourth of July by watching the parade from City Hall Plaza + catch the reading of the Declaration of Independence at the Old State House.

• Vinyasa Yoga with Down Under Yoga | Wednesday, July 5 | 6-7 p.m. | The Common at CX, 320 Morgan Ave., Cambridge | Free | Bring your own mat and reserve a spot online for this all-levels CX Fit class.

• Honeycomb Creamery Pop-Up | Thursday, July 6 | 5-9 p.m. | Lamplighter Broadway, 284 Broadway, Cambridge | Price of purchase | Cool off at the Broadway taproom with sweets from the Cambridge ice cream shop.
• Atomic Comedy Indie Improv Night | Thursday, July 6 | 7 p.m. | Cafe at the Somerville Armory, 191 Highland Ave., Somerville | Free | Doors open at 7 p.m. for the show featuring three local comedy acts, followed by an improv jam.

Virgin all day margarita

• 2 oz. Ritual Tequila Alternative
• 1 oz. orange juice
• 1 oz. fresh lime juice
• 1/2 oz. simple syrup
• Lime slice

• Independence Day. America has been celebrating this day for 247 years, since the Declaration of Independence was formally adopted on July 4, 1776. Spend the day walking along the Freedom Trail or catch tonight’s fireworks over the Charles River.

• A cafe called Folio is planning to open near the Boston Athenaeum in Beacon Hill later this summer. The Catered Affair’s new cafe will be located at 14 Beacon St. and serve made-to-order shareable plates, wines, and craft cocktails.

• Here’s some shucking good news. Carrie Nation Restaurant & Cocktail Club in Beacon Hill is offering $1 oysters Tuesdays-Thursdays from 4 to 7 p.m. Let us know which other local restaurants serve up bargain bivalves.

• Applications are now open for Now and There’s public art accelerator. Local artists can send submissions through Monday, July 31 with ideas for temporary, large-scale public art. Think: The new “Joyful Stitch” installation near South Station.

• The Institute of Contemporary Art is launching a new Vinyl Nights series at the Seaport museum’s wine and coffee bar. The free waterfront music series kicks off on Friday, July 14 with Soulelujah.