diff --git a/src/day12.rs b/src/day12.rs
index fdf8047..9411008 100644
--- a/src/day12.rs
+++ b/src/day12.rs
@@ -3,7 +3,7 @@ use crate::util::maps::*;
 const DISCOUNT: bool = true;
 
 pub fn day12() {
-    let mut plots: Map<char> = Map::from_string(&crate::input(12));
+    let mut plots: World<char> = World::from_string(&crate::input(12));
 
     let mut regions: Vec<Region> = vec![];
     for (x, y) in plots.coordinates() {
@@ -78,20 +78,20 @@ impl Border {
 
 struct Region {
     pub borders: Vec<Border>,
-    pub tiles: Map<bool>,
+    pub tiles: World<bool>,
 }
 
 impl Region {
-    fn new(x: usize, y: usize, plots: &Map<char>) -> Self {
+    fn new(x: usize, y: usize, plots: &World<char>) -> Self {
         let c = plots.get(x, y).unwrap();
-        let mut tiles = Map::<bool>::from_dimensions(plots.width(), plots.height(), false);
+        let mut tiles = World::<bool>::from_dimensions(plots.width(), plots.height(), false);
 
         fn collect_plots(
             c: char,
             x: usize,
             y: usize,
-            plots: &Map<char>,
-            tiles: &mut Map<bool>,
+            plots: &World<char>,
+            tiles: &mut World<bool>,
         ) -> Vec<(usize, usize)> {
             if plots.get(x, y) != Some(c) || tiles.get(x, y) == Some(true) {
                 return vec![];
diff --git a/src/day15.rs b/src/day15.rs
index 5aa1f3b..bd97625 100644
--- a/src/day15.rs
+++ b/src/day15.rs
@@ -40,11 +40,11 @@ pub fn day15() {
 }
 
 fn move_on_map(
-    map: &Map<Terrain>,
+    map: &World<Terrain>,
     x: usize,
     y: usize,
     direction: Direction,
-) -> Option<Map<Terrain>> {
+) -> Option<World<Terrain>> {
     let cascading_move = || {
         let (nx, ny) = map.travel(x, y, direction)?;
         let mut downstream = move_on_map(map, nx, ny, direction)?;
@@ -82,7 +82,7 @@ fn move_on_map(
     }
 }
 
-fn double_wide_map(map: Map<Terrain>) -> Map<Terrain> {
+fn double_wide_map(map: World<Terrain>) -> World<Terrain> {
     let new_map = map
         .iter_rows()
         .map(|row| {
@@ -100,7 +100,7 @@ fn double_wide_map(map: Map<Terrain>) -> Map<Terrain> {
                 .collect()
         })
         .collect();
-    Map::from_2d_vec(new_map)
+    World::from_2d_vec(new_map)
 }
 
 #[derive(Copy, Clone, Eq, PartialEq, Debug)]
@@ -129,7 +129,7 @@ impl Display for Terrain {
 #[grammar = "grammars/day15.pest"]
 struct Day15Parser {}
 
-fn parse(input: &str) -> (Map<Terrain>, Vec<Direction>) {
+fn parse(input: &str) -> (World<Terrain>, Vec<Direction>) {
     let (map, directions) = Day15Parser::parse(Rule::input, input)
         .unwrap()
         .nth(0)
@@ -142,7 +142,7 @@ fn parse(input: &str) -> (Map<Terrain>, Vec<Direction>) {
     (parse_map(map), parse_directions(directions))
 }
 
-fn parse_map(input: Pairs<'_, Rule>) -> Map<Terrain> {
+fn parse_map(input: Pairs<'_, Rule>) -> World<Terrain> {
     let map_vec = input
         .map(Pair::<'_, Rule>::into_inner)
         .map(|row| {
@@ -156,7 +156,7 @@ fn parse_map(input: Pairs<'_, Rule>) -> Map<Terrain> {
             .collect()
         })
         .collect();
-    Map::from_2d_vec(map_vec)
+    World::from_2d_vec(map_vec)
 }
 
 fn parse_directions(input: Pairs<'_, Rule>) -> Vec<Direction> {
diff --git a/src/day16.rs b/src/day16.rs
index eb41665..87e0d5d 100644
--- a/src/day16.rs
+++ b/src/day16.rs
@@ -3,8 +3,8 @@ use itertools::Itertools;
 use std::collections::HashMap;
 
 pub fn day16() {
-    let input: Map<char> = Map::from_string(&crate::input(16));
-    let maze: Map<bool> = input.map(|&c| c == '.' || c == 'S' || c == 'E');
+    let input: World<char> = World::from_string(&crate::input(16));
+    let maze: World<bool> = input.map(|&c| c == '.' || c == 'S' || c == 'E');
 
     let start: Transform = input
         .enumerate()
@@ -117,11 +117,11 @@ struct Transform<'a> {
     x: usize,
     y: usize,
     direction: Direction,
-    map: &'a Map<bool>,
+    map: &'a World<bool>,
 }
 
 impl<'a> Transform<'a> {
-    fn new(x: usize, y: usize, direction: Direction, map: &'a Map<bool>) -> Self {
+    fn new(x: usize, y: usize, direction: Direction, map: &'a World<bool>) -> Self {
         Self {
             x,
             y,
diff --git a/src/util/maps.rs b/src/util/maps.rs
index a5af1bf..19ef915 100644
--- a/src/util/maps.rs
+++ b/src/util/maps.rs
@@ -48,16 +48,16 @@ impl Direction {
 }
 
 #[derive(Clone)]
-pub struct Map<T>
+pub struct World<T>
 where
     T: Copy,
 {
     pub map: Vec<Vec<T>>,
 }
 
-impl Map<char> {
+impl World<char> {
     pub fn from_string(string: &str) -> Self {
-        Map::from_2d_vec(
+        World::from_2d_vec(
             string
                 .lines()
                 .filter(|line| !line.is_empty())
@@ -67,7 +67,7 @@ impl Map<char> {
     }
 }
 
-impl<T> Map<T>
+impl<T> World<T>
 where
     T: Copy,
 {
@@ -153,13 +153,13 @@ where
         self.coordinates().map(|(x, y)| (x, y, &self.map[y][x]))
     }
 
-    pub fn map<U: Copy, F: Fn(&T) -> U>(&self, f: F) -> Map<U> {
+    pub fn map<U: Copy, F: Fn(&T) -> U>(&self, f: F) -> World<U> {
         let v = self.map.iter().map(|row| row.iter().map(|e| f(e)).collect()).collect();
-        Map::<U>::from_2d_vec(v)
+        World::<U>::from_2d_vec(v)
     }
 }
 
-impl<T> Display for Map<T>
+impl<T> Display for World<T>
 where
     T: Copy + Display,
 {