Gardenia Events is in the middle of their "The Hard Catch Hunt 2017" event if you are looking for an enjoyable, medium sized hunt to give you an excuse to stretch your legs and do a little exploring in SL. The shops have hidden little question mark icons, pink for the ladies, blue for the men and yellow for unisex gifts, which makes it easy to decide whether you want the item when you find it or not (each hidden item is 1L). So guys, tag along and hunt with your girl - you won't end up with a folder full of dresses!
Use their official page for the LMs to each store, there are no landmarks in the hunt items. The official page also has hints and information about stores which have dropped out or are not ready on time. I gave the LM to the first store on their list below, but you can do this hunt in any order since you have all the LMs on their site.
The event runs until the end of August, so there is still plenty of time to work your way through all 50 stores.
Official Blog/Flickr: Gardenia Events
Dates: July 16 to August 31
Start/Location: Sweet Peach Designs