Gowalla

 Gowalla  is a location checkin silo that operated from 2007 to 2012 and was then rebooted in 2021. It is functionally similar to Foursquare but with a unique design aesthetic that won it loyal fans.

History
It was acquired by Facebook and unceremoniously shut down soon after, despite their cheerful announcement:

We’re excited to announce that we’ll be making the journey to California to join Facebook

as mentioned in

Screenshots
Screenshots of the original Gowalla are preserved in older blog posts, including:
 * https://techcrunch.com/2010/03/31/gowalla-ipad-screenshot/
 * https://www.pushing-pixels.org/2011/03/07/screenshots-of-gowalla-3-for-android.html

Reboot
In 2021, Josh Williams announced that he was bringing back Gowalla in a new form, with new co-founder Patrick Piemonte. They launched a "Street Team" beta program for early adopters. The new Gowalla uses aspects of augmented reality and NFTs.

The podcast The Gowalla Story ran in 2021 for 5 episodes, hosted by Josh Williams and Dan Benjamin: "an exploration of the rise, fall, reinvention, and reimagining of a startup"