Mine Sweeper
From WikiRaider
Mine Sweeper is a Challenge in Tomb Raider (2013). To fulfil this side quest, Lara has to find and detonate 10 Mines in the Shipwreck Beach location. The mines are scattered along the beach and can be detonated using with any weapon.
Each detonated mine earns Lara +10 XP, the last one that completes the set earns her +150 XP.