Volcanoes do what they want to do, and they definitely don't care about your travel plans.
Remember when Iceland's Eyjafjallajökull eruption halted air travel for millions of Europeans for several months in 2010?
Last week, ash clouds from two erupting volcanoes in Indonesia stranded thousands of travelers at airports as they headed home for Eid al-Fitr celebrations.
Nearly 130 volcanoes are currently active in Indonesia, but that's just the tip of the mountain, as far as volcanoes go.
Liz Cottrell, a research geologist and the director of the Smithsonian Institution's National Museum of Natural History Global Volcanism Program, told HuffPost that its database lists 1,540 active volcanoes around the world, about 25 of which are currently erupting at any given time -- and millions more on the seafloor.
"When you go dredge the seafloor along mid-ocean ridge system you find fresh volcanic rocks every time you go," she said.
Below are photos of some of these volcanoes that have erupted around the world.
1. Colima, Mexico
View of the Fire Volcano spewing ash from Queseria community, Colima State, Mexico, on July 11, 2015. Western Mexico's Volcano of Fire spewed a 2.5-mile column of ash and molten rock late Friday, prompting authorities to evacuate 80 people from a small village. The eruptions from the volcano, on the border between the states of Jalisco and Colima, intensified in early July and ash rained down on at least seven communities, according to federal authorities.
View of the Fire Volcano spewing ash from Tonila community, Jalisco State, Mexico, on July 11, 2015. Western Mexico's Volcano of Fire spewed a four-kilometre column (2.5 miles) of ash and molten rock late Friday, prompting authorities to evacuate 80 people from a small village. The volcano, on the border between the states of Jalisco and Colima, has been active since Thursday but its eruptions intensified on Friday and ash rained down on at least seven communities, according to federal authorities. AFP PHOTO / HECTOR GUERRERO (Photo credit should read HECTOR GUERRERO/AFP/Getty Images)
In this image released by the Jalisco State Civil Protection and Firefighters Unit on Wednesday Jan. 21, 2015, the Colima volcano spews a large plume of ash and steam as seen from a vantage point near the town of Ciudad Guzman, Mexico. The volcano's activity has increased during the last few weeks but so far, authorities have declared that the communities nearest the volcano are not at risk. (AP Photo/Unidad Estatal de Proteccion Civil y Bomberos, Jalisco)
Clouds of ash fill the sky after an eruption by the Colima volcano, known as the Volcano of Fire, near the town of Comala, Mexico, Friday, July 10, 2015. The volcano spewed ash more than 4 miles (7 kilometers) into the air and released some quantity of lava. People were advised to recognize a 3-mile (5-kilometer) perimeter around the peak. (AP Photo/Sergio Tapiro Velasco)
Lava flows down the banks of the Colima Volcano, also known as the Volcano of Fire, near the town of Comala, Mexico, Friday, July 10, 2015. The Colima volcano has erupted, spewing ash more than 4 miles (7 kilometers) into the air and releasing some quantity of lava. People were advised to recognize a 3-mile (5-kilometer) perimeter around the peak. (AP Photo/Sergio Tapiro Velasco)
2. Mt. Raung, Java
Mount Raung spewed volcanic material into the air as seen from Songgon, East Java, Indonesia, on Thursday, July 16, 2015. Eruptions at two volcanoes Thursday caused closures at three Indonesian airports, including one serving the country's second-largest city.
An Indonesian farmer works on a farm at dawn while the 3,300-metre (10,800-foot) Mount Raung volcano emits a column of ash and steam as seen from Jember district, located in eastern Java island on July 12, 2015. Ash spewing from the Indonesian volcano closed the airport again on neighbouring Bali on July 12 just a day after it reopened, causing fresh travel chaos for weary holidaymakers stranded on the resort island. AFP PHOTO (Photo credit should read STR/AFP/Getty Images)
In this late Saturday, July 11, 2015 photo taken using long exposure, volcanic material spewed by Mount Raung glows from the hot molten lava in its crater as seen from Songgon, East Java, Indonesia. Ash spewing from a volcano on Indonesia's main island of Java sparked chaos for holidaymakers as airports closed and international airlines canceled flights to tourist hotspot Bali, stranding thousands. (AP Photo/Trisnadi)
3. Mt. Sinabung, North Sumatra
Mount Sinabung volcano spews giant volcanic ash over abandoned houses at Bekerah village in Karo, North Sumatra on June 25, 2015. Sinabung is one of 129 active volcanoes in Indonesia, which sits on the Pacific Ring of Fire, a belt of seismic activity running around the basin of the Pacific Ocean.
Mount Sinabung volcano spews giant volcanic ash in Karo, North Sumatra on June 25, 2015. Sinabung is one of 129 active volcanoes in Indonesia, which sits on the Pacific Ring of Fire, a belt of seismic activity running around the basin of the Pacific Ocean. AFP PHOTO / SUTANTA ADITYA (Photo credit should read SUTANTA ADITYA/AFP/Getty Images)
KARO, NORTH SUMATRA, INDONESIA - JUNE 20: A man take a picture as Mount Sinabung spews pyroclastic smoke, seen from Tiga Kicat village on June 20, 2015 in Karo District, North Sumatra, Indonesia. According to The National Disaster Mitigation Agency, more than 10,000 villagers have fled their homes since the authorities raised the alert status of Mount Sinabung erupting to the highest level. (Photo by Ulet Ifansasti/Getty Images)
KARO, NORTH SUMATRA, INDONESIA - JUNE 18: Hot lava runs down Mount Sinabung, seen from Tiga Kicat village on June 18, 2015 in Karo district, North Sumatra, Indonesia. According to The National Disaster Mitigation Agency, more than 10,000 villagers have fled their homes since the authorities raised the alert status of Mount Sinabung erupting to the highest level. (Photo by Ulet Ifansasti/Getty Images)
4. Kilauea Volcano, Hawaii
Roughly two thousand six hundred feet span Halemaumau crater, on Kilauea, Hawaii's youngest volcano. Kilauea has been continuously erupting since 1983. In July 2014, residents of Puna, Hawaii were on high alert when lava from the Pu‘u ‘Ō‘ō vent inched toward their homes over the course of the year.
In this May 3, 2015 photo provided by U.S. Geological Survey Hawaiian Volcano Observatory, smoke and lava explode from Kilauea volcano on Hawaiiâs Big Island. Molten lava and rocks went flying through the air after part of the crater wall collapsed and caused the explosion. (USGS Hawaiian Volcano Observatory via AP)
5. Calbuco Volcano, Chile
In April, Volcano Calbuco erupted in Southern Chile for the first time in over 50 years. Thousands were evacuated, and resident Trevor Moffat told Reuters, "It sounded like a big tractor trailer passing by the road, rattling and shaking, guttural rumbling."
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