Volcanically heated hot springs.

Hidden deep in the Guatemalan jungle is a turquoise paradise of natural pools, caves, and waterfalls.

For centuries, this town's hot springs have been embraced by rich and poor—and even by Popes.

The longest living non-clonal organisms on Earth.

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

The highest peak in Puerto Rico is home to a rare fern that can only be found on six trees at its summit.

The highest point in South Carolina was once owned by an energy company that neglected it but now the state is taking it back.

The highest point in Tennessee, Clingmans Dome bears witness to the ravages of one type of insect.

The highest point in Mississippi is a hilltop that was once used to bombard a nearby town with artillery.

The highest point in Maryland is only accessible by hiking through another state.

Inspiring Herman Melville and Henry David Thoreau, Mount Greylock in western Massachusetts is the highest point in the state at 3,491 feet above sea level.

Earth's tallest volcano is sacred to Native Hawaiians, and home to a dozen world-class observatories.

This abandoned church dominates the landscape of a former mining boomtown.

This rural museum is home to more than 50 local desert reptiles and the world's largest snake bite kit collection.

Three witches are said to be buried beneath these unmarked concrete graves.

Believed to hold the remains of Japan's most infamous fox spirit, this stone is said to kill those who dare approach.

This village is home to the largest existing settlement of the Ainu, the Indigenous people of Japan.

According to one legend, this bridge was crafted after monkeys formed a body-bridge across the gorge.

An eerie reminder to the horrors of World War II.

The world's narrowest strait is often mistaken for a canal.

A train ride to the middle of nowhere gives its passengers some of the most iconic views of Japan's seasons.

One of the only two archaeological sites in Japan to feature petroglyphs, which some believe to be a long-lost writing system of the gods.

These petroglyphs created by ancient Arizonians have withstood centuries of exposure to the elements.

Petroglyphs, bird watching, and a 100-year-old Ranch in one location.