Editor’s Note: Editor’s Note — CNN Travel’s series often carry sponsorship originating from the countries and regions we profile. However, CNN retains full editorial control over all of its reports.

An explosion seen off the Caspian Sea on July Fourth was attributed to a mud volcano eruption. Gavriil Grigorov via Getty Images A mud volcano erupted on an island in the Caspian Sea about 46 miles ...

Joe's Trippin’ pays a visit to the Qobustan State reserve in Azerbaijan. The blog says that while there are as many as 600,000 rock paintings in the territory of the reserve, its main attraction is ...

Atlas Obscura on Slate is a blog about the world’s hidden wonders. Like us on Facebook and Tumblr, or follow us on Twitter. Half of the world’s 700 mud volcanoes—oozing, gurgling mounds of ...

Stretching to the horizon, the gray-white earth rises in peaks, like a well-whipped meringue petrified into mud and rock. A keen wind whips these otherworldly hills, while the land underfoot is ...

Environmental graffiti visits Azerbaijan's mud volcanoes and says they are a sight to behold. The blog says that in 2001 one of the country's 300 mud volcanoes spewed flames 49 feet high. Global ...

We start our tour beside the mouth of Deveboynu volcano, or “Neck of the Camel.” The land around is parched, but inside the crater, a muddy slurry — called mud breccia — is bubbling gently. The hills ...