Denver's most notable buildings will open to the public starting today as part of the annual Doors Open Denver.

Why it matters: The four-day event offers a rare insider's look at the buildings that define the city's architecture.

State of play: This year's programming, sponsored by the Denver Architecture Foundation, includes tours of the Brown Palace, the University Club of Denver, a revamped 16th Street and the sea lion habitat at the Denver Zoo.

• Other ticketed events include a toast to the life and work of the late Dana Crawford at the Harry C. James Residence and an evening on the rooftop of One River North, the eye-catching new building in the RiNo arts district.

Between the lines: Many of the events are ticketed, but free tours of the Boettcher Mansion, Castle Marne and the Denver Woman's Press Club are available.

What they're saying: "Whether you're a lifelong resident or new to Denver, this festival will deepen your love for the city's architecture and natural beauty," Meg Touborg, president and CEO of Denver Architecture Foundation, said in a statement.

👻 History Colorado is hosting Creeporado at 6pm tomorrow, highlighting the state's spooky past.

🏒 The Colorado Avalanche will present its Fan Fest on Saturday starting at 11am at Ball Arena. Tickets start at $27.85

🍻 Woods Boss Brewing is hosting a block party from noon to 10pm Saturday with live music, local vendors and food trucks.

🍺 Oktoberfest celebrations are continuing throughout this weekend at Left Hand Brewing in Longmont, Old 121 Brewhouse in Lakewood, Resolute in Centennial, Hops & Pie in Denver and Denver Oktoberfest.

😋 Milk Market in downtown Denver is hosting a Taste of the Market on Saturday, featuring special dishes from a variety of vendors.

⚾ Head to McGregor Square on Sunday to watch the Colorado Rockies' final game of the season. First pitch against the San Francisco Giants is at 1:05pm.

Here's what's new on your favorite streaming services this week.

"Slow Horses" Season 5, available now on Apple TV+

Zoom in: The plot of this season is adapted from "London Rules," the fifth novel in Mick Herron's "Slough House" book series.

What's next: The show will continue for at least two more seasons.

"The Lowdown," available now on Hulu

What's inside: This noir series from creator Sterlin Harjo ("Reservation Dogs") follows a citizen journalist (played by Ethan Hawke) in Tulsa who investigates a local conspiracy.

The intrigue: The cast includes veteran actors like Keith David, Tim Blake Nelson, Kyle MacLachlan and Tulsa native Jeanne Tripplehorn.

"House of Guinness," available now on Netflix

State of play: This historical drama follows the fates of Irish brewer Sir Benjamin Guinness' four children after his death in 1868.

Behind the scenes: The series is produced by "Peaky Blinders" creator Steven Knight.

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