No matter where I go, no matter how remote the location, there is always garbage. Lots of it.
Plastics and other garbage. Humanity's gift to the oceans.
In fact, there is usually so much trash that it's impossible to photograph it all.
Garbage on the beach
If an alien race did decide to visit us for some reason, I suppose all it would take is one look at our oceans and beaches for the interstellar visitors to understand humanity.
This is our shameful legacy.