The /r/place Atlas

Terraria's guide

The first NPC encountered in the 2D sandbox game Terraria (the image failed to be properly rebuilt before place ended)

Norge

A reddit in Norwegian for Norwegian redditors and Norwegian issues.

Bird That Carries You Over A Disproportionately Small Gap (Undertale)

Bird That Carries You Over A Disproportionately Small Gap (yes, it is the full name) is a minor NPC from video game Undertale.
The small bird to the right is not from the game, but probably inspired by this one.

Hungary-Romania Friendship Heart

Former Red Corner

42-39

Unfortunately, due to vandals from Penn State, this artifact was destroyed. In it's glory, this box paid homage to the greatest football game of the 21st century, when The University of Pittsburgh defeated Penn State, 42-39. It has been over 16 years since Penn State last defeated Pitt.

FREESM!

CLG's main chant against its biggest rival TSM. I think this should be added to the adjacent CLG logo which already has a description on place

Roronoa Zoro

Roronoa Zoro is one of the main characters in the popular shounen manga One Piece.

Houston Texans

The Houston Texans are a professional National Football League (NFL) team based in Houston, TX. Accompanied by a Texas flag themed r/placeheart. Fuck the Colts.

Scottie Dreidel

A dreidel with a Scottish saltire, placed to commemorate the good relations between Scotland and Israel.

Mona Lisa

In order to prove the point that reddit users are a cultured bunch, a group of them set out to recreate Leonardo da Vinci's Mona Lisa.

Philadelphia Flyers

National Hockey League (NHL) team

Beaver

The start of a Beaver covering the Golden State team logo. This beaver was designed and championed by the Canada users, but sadly only the lower half of the beaver was completed before r/place ended.

Flag of Latvia

Sash Lilac

Sash Lilac is one of the main protagonists from the 2014 indie game Freedom Planet, and the upcoming Freedom Planet 2.

Jen❤️

This is a rare mostly-intact message from a random civilian unaffiliated with any subreddit. Jenny's fiancé was originally trying to place this under the pink and purple heart in the Madoka artwork, and the Madoka team reacted by erasing it - but reached out to the user in question and negotiated a transplant. The text at this location originally read "Jenny ❤️". The Madoka team kept it tidy as part of a neighborhood-watch effort to deter vandalism and invasion, and negotiated with Turkey to shorten it when they wanted some of the space above for Hayir. The final form is unfortunately mildly vandalised.
Previously at this location was the message LDSConf for the Church of Jesus Christ of Latter-Day Saints annual conference.

Denver Broncos Logo

The Broncos are an american football team from Denver, Colorado. They are noted for winning Superbowl 50 in 2016.

Bard

This is Bard, one of the champions in League of Legends, who was released in 2015, soon became popular among support players.

The Lovers' Heart

Made by two lovers, this heart was originally placed left of the USA flag, after some deliberation with the American community, it was moved here. Consisting of the lovers' two favourite colours, it represents their strong bond.

gachiGASM

A meme on Forsen's stream, and on twitch.tv in general. Consumed by sweden and no longer recognizable.

SRTViper

Signature of /u/SRTViper. This battle weary sig made it to the end despite being constantly displaced and overwritten

Redback spider

The redback spider (Latrodectus hasseltii) is a species of highly venomous spider indigenous to Australia. Its image was created after a brief border skirmish as a symbol of cooperation between r/parahumans and r/straya.

King of Sweden: Carl XVI Gustaf

Carl XVI Gustaf is the current king of Sweden, reigning from the 15th of September 1973 to present day.

Emilia Best Girl

A reference to Emilia, a character from the recent popular anime Re:Zero

Gran Colombia

The flag of Gran Colombia, state that encompassed much of northern South America and part of southern Central America from 1819 to 1831. It included the territories of present-day Colombia, Venezuela, Ecuador, Panama, northern Peru, western Guyana and northwest Brazil.

Philippines-Iceland-Faroe Islands Heart

A heart commemorating the alliance us island countries shared on /r/place.

Flag of Japan

Bird

A bird that was in construction right from the start of Place.
Of uncertain origin.
Partially destroyed towards the end of Place's runtime

The UM Football Team

This is the team logo for the University of Miami Football Team.

Critical Role

Critical Role is a Dungeons and Dragons video series starring several voice actors and hosted by Matt Mercer.

Former location of the Bullet Kin

The location of where a Bullet Kin, a common enemy from the game Enter The Gungeon, once existed. Enter the Gungeon is a bullet hell roguelike video game developed by Dodge Roll and published by Devolver Digital.

The Bullet Kin was considered as a mascot, or "protector", of /r/TheBlueCorner despite its relatively late appearance. It was unintentionally engulfed during the final expanding of the blue corner.

Northern Mexican Territory

The territory controlled by r/mexico began with a flag in the top right of this area and grew to create a sign reading 'Viva Mexico Cabrones!' to the left. Further expansion of this area was done by extending the flag downwards and claiming the territory to the left to match, parts of which were already held by other factions. Some, such as a Spanish Flag, were overwritten, and some were incorporated into the design, such as a Duck from r/duckgame and a pixelart Yoshi.
Tension between r/ukplace and r/mexico grew when a cactus was built which began extending up into the dress of r/ukplace's depiction of Queen Elizabeth II, but negotiations brought about a peaceful resolution and a non-aggression pact between the two powers.
In the final hours of Place, a Void Core was created in the left hand side of this territory and quickly expanded to cover the flag and destroy the pixelart, but was beaten back by a combined effort of r/mexico and several surrounding factions.
The flag was quickly rebuilt, but the empty space to the left became contested territory as r/ukplace began construction of Big Ben in the area, to which r/Mexico responded by attempting to expand their flag over it - a project which was only partially completed as Place came to an end.

Aromantic Flag

Pride flag for people who lack romantic attractions to others.

Clan Icahn

Initially stating Clan Icahn, before being partially damaged near the endgame. Clan Icahn is a small, but active gaming community, and is happy to have secured itself a spot on r/place

Flag of South Korea

Watchmen Badge

A smiley face badge used by the character "The Comedian" in the graphic novel & film "Watchmen". Effectively the logo of the show.

Australian Self Image

The best self image of any country in the world. Contains the man himself, Steve Irwin, Vegemite, a Koala, Spider, Snake, and naturally, a boxing Kangaroo. With the country's national collective greeting: "G'Day Cunts"

RIT

A hijacked art piece that originally said "PITT". RIT stands for Rochester Institute of Technology. It is a tech-oriented university in upstate New York.

Nintendo Switch

Nintendo's dual home/portable video game console.

Bisexual pride flag

The bisexual pride flag was designed by Michael Page in 1998 in order to give the bisexual community its own symbol comparable to the gay pride flag of the larger LGBT community. According to Page, "the pink color represents sexual attraction to the same sex only (gay and lesbian), the blue represents sexual attraction to the opposite sex only (straight) and the resultant overlap color purple represents sexual attraction to both sexes (bi).

Stealth Pepe

Pepe the frog was placed and overwritten with prejudice many times, but this one survived by being tiny, the rarest of them all

Carrot icon

Memorial to the carrots' field that was destroyed by the keke flag.

The Royal Banner of Scotland

Lion Rampant of Scotland was built over a group of Space Invaders from the video game of the same name, but was not finished before Place ended.

(Incomplete) Oregon Trail Carriage

A carriage from the computer game "The Oregon Trail) was in the works. Unfortunately, the piece was incomplete when r/Place had ended.

百合GL (Yuri)

"百合" means Yuri in Japanese, and GL stands for Girls' Love. A genre in anime/manga that depicts love between women. Additionally, the Touhou series which is located above is known to have a lot of yuri fanworks.

Stardew Valley

A chicken from Stardew Valley, an indie farming simulation role-playing video game developed solely by Eric Barone and published by Chucklefish Games.

Smiling Ancap Meme

Ancap (Anarcho-Capitalism) memes are a meme depicting a smiling face wearing sunglasses and giving a thumbs up while poking fun at anacho-capitalism.

KurtJMac

The Minecraft skin of KurtJMac, most well known for attempting to walk to the far lands in Minecraft.

The Far Left Side

The Far left side was made up of dedicated Leftists working together to create a community on r/place

Rainbow 6 - Sent to the Team

An Ubisoft Community Manager, /u/its_epi, often informs the Rainbow 6 developers about bugs posted on the game's subreddit, notifying the community with the phrase, "Sent to the team!".