Rarest structures

 Structures on and underground.. 

There are many different structures in the game, Minecraft. There are structures like Temple's, Igloo's, Shipwreck's etc. structures like these can be found in different biomes, under water or underground. Be careful though, since you may die once finding all type's of structure's.. Presenting three of the hardest structure's to find in Minecraft!

Starting off with Mineshaft's, they can be mainly found underground or parts of the Mineshaft can be found above ground. They are common in Mesa Biome's and will also be found on ground. Mineshaft's will contain a lot of loot (items) in chest's or finding spawner's for Mobs (Zombies, Skeletons, Spiders, Poisonous spiders). There are a many tunnel's while going through a Mineshaft so remember the turns you make! 

Moving on to the Ocean Monument, which will be a bit harder to locate (unless you live near a ocean!) along with being the third hardest structure to find. Ocean Monument's will only be found in ocean's underwater but luckily the structure is huge so it is very noticeable. Inside the Monument, there will be fish-like mobs (will also be different size's) that will harm you once getting near them. Once you get to killing the bigger Mobs they will drop a sponge (draining up water) but became though, you can be there for a long time so bring water breathing potions!

Next up will be the Woodland Mansion, second hardest structure to find! The Woodland mansion will only be found in the Dark Oak Forest biome and surrounded by many tree's. They could be located by maps but sometimes the journey could be very far so prepare yourself for a journey! There will be all types of Mob's spawning like the basic mobs along with other Mob's (Vindicator, Evoker, Vex's and Witch's). There are different chest's will loot and you can even earn a Totem of Undying. It is also important to wear good armor or there's a chance you will get defeated!

And the hardest structure to find in Minecraft, the Stronghold! The Stronghold is one of the hardest structures of locate in Minecraft and will mostly be located underground in caves, or even on ground (very rare). A Stronghold will have many different room's that can either have mobs or will be empty, there can also be a library located within the stronghold that will have a chest inside. In a specific room, there will be a Portal which will lead you to the End where you will fight the Main Boss. Be careful once getting there since it won't be so easy!