The most active volcano in Costa Rica, with its first eruption taking place in 1968.
Mount Unzen is actually a group of volcanoes, with the highest being Mount Fugen, at 1,360 meters (4,462 feet).
The volcano that produced the second largest eruption of the 20th century.
The volcano that changed the history of the United States in just minutes, today a National Volcanic Monument.
Guatemala's most active volcano and at the same time the most frequently climbed volcano in the country.
A sea stack of volcanic origin, standing above the water, 2 kilometers northeast of the island of Stromboli.
It consistently ranks the most-visited national park in the United States of America, with 9-10 million visits per year.
A highland area in Bali, offering dramatic views of the active volcano Mount Batur and serene Lake Batur.
Covering 10% of Bali's area, this is the only national park on the island.
A place of natural beauty, one of the Bay Area's overlooked treasures.
The park has excellent spots for high altitude alpine hiking, backpacking and rock climbing as well as ample opportunity for spotting wildlife.
World renowned for its well-preserved cliff dwellings and desert landscape and steep canyons.
Located at the base of the Alaskan Peninsula, it's home to a huge number of Alaskan brown bears.
A wilderness preserve comprised of Isle Royale and the surrounding waters and small islands.
The landscape of this national park in Bolivia includes a range of ecosystems, from high altitude grasslands to clouds forests, lowland tropical forests to pristine lowland savannas.
Mikumi is in Tanzania and here you can see quite an unusual phenomenon: the "midget" elephants.
