Lost Land Redux has an increasing number of Dungeons!
You can find these on the Dynmap or read about the details of each Below
Contents
Raider Fort

Location: X = 16 Z = -2171
Difficulty: Diamond Gear Recommended
Requirements: Raiders Supplies (From Raider Outposts)
Quick Tips: You can skip some lower floors with movement items
Necromancer's Lair

Location: X = 2175 Z = -779
Difficulty: Protection Enchanted Diamond Gear
Requirements: Quest
Quick Tips: He shoots heatseeking missiles, it helps to keep distance!
Dwarven Ruins:

Location: X = 1575 Z = -1440
Difficulty: Protection Enchanted Diamond Gear
Requirements: Ghimlos Pick (From The Market or Necromancer's Lair)
Quick Tips:
Wither Dungeon

Location: X = 3054 Z = -572
Difficulty: Protection IV Gear and/or Magic Armor and Items
Requirements: Wither Dungeon Key (From Wither Skeletons at Towers)
Quick Tips: Focus the wither minions, they heal the wither! And bring friends!
Desert Dungeon

Location: X = 2375 Z = -950
Difficulty: Protection IV Gear and/or Magic Armor and Items
Requirements: Stolen Crown (From Raider Fort) & Curses Remnant (From Dwarven Ruins)
Quick Tips: Bring a bow and some good gear
Haunted Manor

Location: X = 2900 Z = -360
Difficulty: Protection Enchanted Diamond Gear
Requirements: Money Entry
Quick Tips: Dont get Spooked! Bring friends for the Reapers Raid