Take a leisurely walk through the park to find the seven giant troll sculptures hidden throughout the park.

Potato-peeling mannequins, Inca art, and a dangling tuber mobile help trace the history of fries at this Belgian museum.

An exceptional engineering feat that facilitates the migration of salmon upstream during their breeding season.

In the upscale neighborhood of Miraflores in Lima, a pretty little park is home to dozens of cats.

A colony of Mexican free-tailed bats live under the bridge and take flight at sundown all summer long.

This fountain has a growing (animal) population, and might also be growing in size.

The largest underground lake in Europe.

A symbol of friendship between the mountainous regions of Switzerland and Bhutan.

These spindly, stone-capped formations are the product of glacial deposits and thousands of years of erosion.

Zambia's smallest national park is home to one of the world's largest annual mammal migrations.

Along a coast that sees the annual migration of humpback whales, a geological formation that takes the shape of a whale’s tail.

A rare kind of blue bear can be found chiefly in the national park that shares their name.

While not recognized by Guinness, this chocolate waterfall is likely to be the world's largest.

The king of U.S. high points towers over every other peak on the continent.

This frozen tunnel in central Alaska is both an engineering feat and a valuable climate classroom.

Gorgeous cave resemble a winter wonderland.