Amazonians, kids, dogs, and neighbors flocked to South Lake Union yesterday dressed as unicorns, delivery dogs, John Snow, and more, to celebrate Halloween festivities across Amazon’s Campus.

The activities included Amazon’s haunted house, a dog-friendly Barktoberfest hosted by Downtown Dog Lounge, trick-or-treat bag decorating, and other spooky surprises.

Over 3,000 Amazonians and their family members dared to enter the Haunted House, which included an eerie forest, a haunted dinner party and a pig butcher’s chamber—with zombies scattered along the way.

Hundreds of dogs and their owners enjoyed Barktoberfest hosted by Downtown Dog Lounge on the Van Vorst Plaza with dog-friendly treats and activities. Dozens of dogs participated in the costume contest. Between Daenerys and her pet dragon, to a canine trio of Pooh Bear, Eeyore and Piglet, it was tough for the judges to pick a winner.

Amazonians and their families also enjoyed a pumpkin patch, elaborate decorations next to The Spheres, and trick-or-treating from desk to desk with colleagues.