Coastlines are not eroded evenly. The sea attacks everything and removes softer material faster, which is why almost every coast is a sequence of projections and indentations rather than a…
Every gorge answers two questions: what removed the rock, and why did the sides not fall in afterwards. The second is frequently the more interesting. Here are seventeen answers.
1.…
The feature that makes a fjord a fjord is the sill at its entrance - a shallow threshold of rock and debris left where the glacier terminated. Water inside is…
What makes these places worth visiting is not the spring itself but what a community does when free heat is available indefinitely. The answers are remarkably consistent. Here are ten.…
A cave developed for visitors is called a show cave, and the good ones manage to be accessible without being diminished. These twelve have walkways, guides and lighting, and are…
Canyons are slow arguments between rock and water, and the winner is always the water given enough time. What varies is the rock, the climate and how long the argument…