High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

The largest stone circle in the world has ended up bringing up more questions than it has answered.

Famously misunderstood wonder of the ancient world

This extraordinary geological oddity resembles human-made pavement.

Northern Ireland's Brobdingnagian stepping stones.

A wonder of natural limestone formations etched by millions of years of natural interaction between rainfall and rock and air.

Clusters of huge boulders in the Australian Outback.