© iStock

On top of the world - Sometimes the heights are what drive these adrenaline seekers to push their limits.

© iStock

Thin line - The line that separates standing from falling in the sea is way too thin. Literally.

© iStock

Mountain balance - Would you dare do something like this?

© iStock

Risky jump - Parkour can be an extremely dangerous activity.

© iStock

Acrobatic cyclist - You have to be confident in your skills to even attempt this one!

© iStock

Cycling skills - This stunt looks so hard!

© iStock

Balance - Hopefully this was calculated to the millimeter.

© iStock

Parkour - This is a very stylish jump though!

© iStock

Tight rope - Slacklining during sunset can be a beautiful experience.

© iStock

Skydiving - This picture gives you the chills just by looking at it!

© iStock

Vertigo - The trick is to never look down.

© iStock

Dangerous stunts - That's what we call brilliant photographic timing.

© iStock

Skyscrapers - Some people are only comfortable outside their comfort zone.

© iStock

Parkour - Will he make it?!

© iStock

Focus - Head on the ground, feet in the clouds.

© iStock

On the edge - Is this position even comfortable?!

© iStock

Slackliner - It almost feels like the line can't hold a person's weight - but physics proves us wrong.

© iStock

One foot only - This guy is just trying his luck out.

© iStock

Calculated stunt - Another great parkour stunt.

© iStock

Looks easy... - But it's not! If you ever want to try slacklining, you must practice your balancing skills first.

© iStock

Chilling - If you suffer from vertigo, you might want to look away now.

© iStock

Up in the clouds - How can some people look so relaxed when they're so high up?!

© iStock

Concentration - Humans really are tiny compared to Mother Nature.

© iStock

Panoramic view - The view from up there must be amazing... if you're brave enough to do it.

© iStock

Mountain bike - He's going a little to close to the edge, don't you think?

© iStock

Bike jump - How many times has he had to fall before he managed this cunning stunt?

© iStock

Push-ups - Slacklining is already hard as it is, but doing push-ups on the rope? That's next level!

© iStock

Landscapes - Aren't they too focused on not dying to enjoy their surroundings?

© iStock

All for the views - In the end, it's all a competition to see who gets the best view!

© iStock