A man reveals the incredible science he used to answer how Australia's Lake Hillier gets its bubblegum-pink color. Then, the black sand at Iceland's Diamond Beach is dotted with glacial ice, and China's Shilin Stone Forest captivates and mystifies.
Geologists explain the phenomena behind beautifully rounded boulders in New Zealand. Then, Chinese mountains covered in turquoise, lavender, magenta and gold are explored, and caves in Australia feature intricate limestone crystal formations.
The cause behind the shimmering blue waves off the coast of Australia is uncovered. Then, Australia's Karijini gorges are some of the oldest in existence, and a volcanic region of Iceland has bubbling potholes that create an otherworldly atmosphere.
A professor shares fascinating new discoveries surrounding an ancient monument, the Giant's Causeway, in Northern Ireland. Then, a busy, modern metropolis collides with ancient archaeological evidence at Los Angeles' La Brea Tar Pits.
We get a closer look at geysers at a US national park and a geothermal field in Iceland. Then, a stack of pancake-shaped rock formations bewilders passersby in New Zealand, and approximately 50 million crabs journey across Christmas Island, Australia.
Russia's Lake Baikal, famous for being the largest, oldest and deepest freshwater lake on Earth, is explored. Then, the cause behind the frothy waves of "Cappuccino Coasts" is explained, and the oldest-known caves in the world are uncovered.
