The 'Alien Stone' boulder was transported several kilometers from the volcanic vent during the 2010 explosive eruption.
The surrounding landscape is composed of 'lahar' or volcanic debris flow material that solidified after the eruption.
This area was previously a populated village site before being declared a danger zone during the 2010 activity.
Geologists monitor the sediment flow in this area during the rainy season due to the loose volcanic ash deposits.
Lava Merapi and Alien Stone is a volcanic tourism site located in the Kepuharjo village, situated on the slopes of Mount Merapi. The area showcases the physical aftermath of the 2010 Merapi eruption, featuring scorched landscapes and solidified volcanic material. The 'Alien Stone' refers to a specific boulder ejected during the eruption that resembles the shape of a human face when viewed from particular angles. Visitors can explore the site on foot or via Jeep tours, which navigate the rugged ash-covered terrain. The location serves as a stark natural monument to the scale of the volcanic activity that reshaped the Sleman Regency. It provides direct views toward the active volcanic peak of Mount Merapi. The site includes remains of houses and structures partially buried by volcanic deposits.
Directly in front of the Alien Stone boulder with the peak of Mount Merapi as the backdrop.
Wear sturdy, closed-toe walking shoes to navigate the loose, sharp volcanic gravel and sand.
Bring a hat and sunscreen, as there is almost no natural shade across the exposed volcanic field.
Opt for a Jeep tour if you intend to visit the more remote lava channels located further up the slope.
Avoid visiting during the rainy season, as the area is susceptible to cold lava floods (lahar) and difficult terrain conditions.
Respect the site as a former residential area; do not remove or disturb volcanic stones and artifacts left on-site.
