Look around you - you're surrounded by stuff. Office supplies, knick-knacks, whatever, it's everywhere, and it can get a little bit mundane. Why not spice things up with these odd, unexpected and often unexplained things that have been found around the planet.

h/t Cyber Breeze

The Quimbaya Airplanes

quimbaya

Scientists are split on whether these Colombian artifacts depict birds, animals - or flying machines. For what it's worth, in 1994 researchers created models based on the Quimbaya Airplanes, and discovered that they could, in fact, fly.

Ulfberht Viking Swords

Ufberht gerade

More than 170 of these swords have been found. They all have the inscription ULFBERHT (or something similar) - perhaps this is one of the earliest examples of trademarking?

Iron Man

Der Eiserne Mann Closeup

Sorry folks - it's not Robert Downey Jr. (or Ozzy Osbourne). Rather, Der Eiserne Mann is a simple iron pillar. But no one is quite sure how - and why - it came to be.

Roman dodecahedrons

355px Roman dodecahedron

Candleholders? Navigation tools? No one knows - we like to think that they were dice for a very, very early version of "Dungeons and Dragons",

The Ubaid Lizardmen

04 ubaid lizard men

Made sometime between 4000 and 5500 BC, these mysterious statues are aptly named. Their exact purpose is unknown, but one thing is for sure - The Ubaid Lizardmen would be a great band name.

The Voynich Manuscript

Voynich Manuscript 170

No one is able to decode the writing system used in this book, thought to be from the 14th-15th century. It's filled with depictions of plants and herbs - no word on whether cannabis is one of them.

The Stone Spheres of Costa Rica

Stone sphere

Known locally as Las Bolas ("The Balls"), the mysterious spheres were added to the list of UNESCO World Heritage sites in 2014.

The Peri Reis Map

Piri Reis map of Europe and the Mediterranean Sea

Made in 1513 by an Ottoman cartographer named Peri Reis, this map garnered much attention as it seems to predict the mapping of Antarctica.

The Antikythera mechanism

NAMA Machine dAnticythere 1

It may look like a wheel, or a prop from a prehistoric X-Men movie. But the Antikythera mechanism is thought to be an ancient computer.

Codex Gigas

Codex Gigas facsimile

Codex Gigas translates to "Giant Book", but it's popularly known as the Devil's Bible - because of that giant drawing of the devil seen above. It's currently housed at Sweden's National Library.

The Tecaxic-Calixtlahuaca Head

Calixtlahuaca Roman Head Feature

This terracotta head was found in Mexico and bears characteristics of Roman sculptures. Perhaps it's an ancient version of an emoji?

Dogū

Dogu Miyagi 1000 BCE 400 BCE

These prehistoric Japanese figures have an unknown purpose, thought to be related to fertility rituals. Not to be confused with Dogg or Doge.

Winnipesaukee Mystery Stone

Lake Winnipesaukee mystery stone at the New Hampshire Historical Society Concord NH

Found in 1872 during the construction of a fence in Meredith, New Hampshire, this totally mysterious stone sits at the New Hampshire Historical Society. Though we think it looks familiar...