Roman ruins top white travertine terraces formed by ancient hot springs.

The ancient latrines of the Greeks, in all their public glory.

These Australian rock formations look like Martian beehives that have grown up out of the landscape.

A scenic natural bridge with a creek running underneath.

This is a full-scale replica of a complete Stonehenge made from locally quarried Esperance granite.

A tiny museum in Esperance, Australia, displays a bunch of space debris from NASA’s Skylab.

Visible from both land and sea.