San Francisco's Tenderloin district remained one of the city's most economically depressed areas for generations.
This building stood vacant for 50 years before Twitter moved its headquarters here.
With a market capitalization of $27 billion, Twitter is altering the Tenderloin from inside this 1937 Art Deco building. Here's the soaring lobby.
In a building this old, home to one of the largest tech companies in the world, classic design and modern technology go side by side.
Stepping off the elevator, you get a nature theme. You feel like you're stepping into a huge bird house.
The feeling continues into Twitter's reception area ...
To the conference room walls ...
The nature theme is part of Twitter's core identity. These deer have moved with the office from its first location.
Visitors are offered a wide selection of refreshments.
The employee selection is far more vast. In the main cafeteria and lounge, it's about letting the outside in with a wall of windows overlooking a meticulously maintained outdoor space.
Through glass doors from the cafeteria, this outdoor area is a big selling point of Twitter employment.
There are BBQs and parties.
While workers often bring blankets and laptops to the massive lawn space to work outside.
Here is where you get lunch.
Employees have many options here. Each area has a different theme for the food.
And a second dining area with a daily menu.
Employees get a wide array of options for their three-portion bowls.
Many people here brag about the company's selection of Kombucha tea.
Though there is plenty to brag about when it comes to eating, too.
The options swing toward healthy food.
Twitter does a nice job combining its urban setting with a relaxing natural feeling within its walls.
Even simple bar tables are beautiful.
The only thing better than working from home is working from someplace nicer than home.
There is only one logo here. From the drink machines ...
To the company time capsule ...
There is little chance anyone here forgets the reach of their work.
These screens are found throughout the office and show bursts of Twitter activity across the globe.
As comfortable as the space is, the focus here is definitely on work/ There is not much socializing going on.
Different types of work spaces are available for every imaginable style.
Twitter had 241 million active users at the end of 2013.
The company's reach is immense.
And now that its settled into its new location, Twitter's reach is changing the world right outside its door.
From the Tenderloin to San Francisco's Pacific Heights.
