Tripadvisor

They clearly went out of their way to make the internship program a fun experience.

There were multiple outings to see the city and do community service, along with an internal hackathon where we got to work on self-directed group projects for a week.

Great food every day at lunch, snacks on every floor -- like working in a startup, except with job security and 1500 other people.

As an intern, I felt a little undermanaged. They had a "buddy" program to match each intern with a mentor, but there weren't any explicit requirements of what that mentor did (or there didn't seem to be). I would've appreciated getting more feedback about my work.

Force the engineers to do more managing. Something like a set of pre-determined questions and critiques at a regular interval would have gone a long way. I had to reach out for feedback, which felt like I was wasting my mentor's time. If it had been built into their schedule, things probably would have been smoother.