Barta Crags is a location in Dragon's Dogma.
" There are many stories of a time, hundreds of years ago, when the Barta Crags were lush, green, and full of life. But then, a dragon rained its fire down on the crags, reducing them to treacherous swampland. It is best to avoid this area altogether, but if you must venture through it, do so at night, for during the day the air is thick with miasma, a poisonous gas guaranteed to cut your adventure, and your life, short." ―Ser Daerio. 
The Barta Crags are a region far to the northwest of Gran Soren. The region encompasses all of Gransys that lies to the northwest of the pass at The Ruins of Heavenspeak Fort. In the northern part of the Crags are the Greatwall Encampment and The Greatwall, which guard Gransys from threats beyond.
The main feature of the Crags is the
Miasmic Haunt, a large poisonous lake. Northwest of the Haunt lies Ophis' Domain, a corral holding a tame Cyclops. The western entrance to Soulflayer Canyon is located southeast of the Greatwall.
No other humans inhabit the Crags, save the female
Bandits found in Heavenspeak Fort, and the soldiers stationed a the Greatwall Encampment.
The Crags are inhabited by
Goblins, Hobgoblins, Direwolves, and Snow Harpies.
The western shores of the
Miasmic Haunt are home to Sulfur Saurians. On the path leading north out of Heavenspeak Fort, a Chimera (or Gorechimera in Post-Game) may be encountered.
night, Phantasms appear over the Miasmic Haunt and other poisonous bodies of water; Wights emerge in the Miasmic Haunt and on the ancient burial ground at the northwestern tip of the Crags; Skeleton Knights and Skeleton Sorcerers appear on the path out of Heavenspeak Fort.
For loot in
The Ruins of Heavenspeak Fort see that article.
The main flora in the Crags are
Mithridate and Cragwort. Pumpkins also grow relatively abundantly.
Note : chest loot lists are incomplete
Spring Water, Panacea
Fourth Journal Entry
Vigor Extract, Serenity Extract, Stone-Moss Poultice, or Iridescent Talisman
Seeker's Token, Giant Coin Pouch, Flamberge
Weapon Pile gather spot within a cage nearby to the east oft gives Detoxicating Powder or Jewel of Toxicity
Stone-Moss Poultice, Imperial Acid, Foreign Medicament
Panacea, Liquid Vim, or Salubrious Brew.
Forest Tunic, Thunder Kite Shield, or Ingot Club
Silver Vest, Pauldron, or Black Gaiters
Sarcophogi nearby to the west may contain a Rousing Incense, and a Cast Stone
Sarcophagi nearby may contain
Staminal Drench, Solar Numen and Giant Coin Pouch.
Winter's Path Tome, Decaying Grimoire, Jewel of Vicissitude, Giant Coin Pouch
Thick Fur Greaves, Ring of Sable, Giant Coin Pouch, Animistic Robe.
Giant Coin Pouch, Foreign Medicament, Stone-Moss Poultice.
Weapon/Armor pile by the captive cage may give Gambeson.
Hunter's Bow, Giant Coin Pouch
Spring Water, Angel's Periapt, Salubrious Brew, Panacea
" 'Tis a land rife with spots where useful materials may hide"
"These woods see few visitors, hence all the monsters and rare materials" (in the woods west of Miasmic Haunt)
"Something preyed on this beast... This is no man's work." (by the skeleton on Chimera territory)
"This fog has us blind..."
"I reckon if we caught a harpy, it could ferry us across."
"Goblin packs are ruled by the strong."
"Careful, ser. The marshes hamper our movement" (in the marsh)
"This stretch was once a river, ere it went dry." (Around dried riverlets between the poisonous pools)
Stone Bridge looking south from Hobgoblin camp
Ophis' Domain - Cyclops Stockade
The Island - relieving Sulfur Saurians of loot...
This boat acts as a bridge to get to the island
Scenic view to Heavenspeak Ruins