Agung rises majestically over eastern Bali to a height of just over 3,000 metres (9,800 feet).
The mountain is a huge tourist attraction, drawing thousands of people into Indonesia each year.
READ MORE: Bali volcano eruption IMMINENT – Mount Agung about to BLOW as lava floods villages
But unsuspecting visitors have seen an even more spectacular sight after the volcano erupted this weekend and is now spewing huge ash plumes into the sky the same size as the mountain itself.
Stunning – but terrifying – images from the summit show the thick, black clouds billowing out the mountain’s crater, leaving a thick smoke over surrounding towns and villages.
In some images, the reddish glow of the red-hot lava welling up in the centre can be seen colouring the plumes.
While in photos from overnight, a bright red glow emitted from Mount Agung amid fears grow the volcano is set to blow again.
On Monday, authorities ordered 100,000 residents living near the volcano to evacuate immediately, warning that the first major eruption in 54 years could be “imminent”.
A five to six-mile exclusion zone has been imposed around the summit after authorities raised the volcano’s alert to the highest level.
Agung’s last eruption in 1963 killed more than 1,000 people and razed several villages by hurling out pyroclastic material, hot ash, lava and lahar.
Cold lava flows, known as lahar, has already flooded the rivers and canals of nearby villages, with many locals ignoring warnings to steer clear.
Hundreds of flights have been cancelled and the local airport remains closed for a second day, leaving about 59,000 tourists stranded on the Island.
On Tuesday, life continued largely as normal in villages surrounding Agung, with residents setting up traditional markets and offering prayers.
But the volcano is continuing to spew tall columns of ash and smoke from its crater.
Bali Disaster Management Agency has warned the Bali volcano could explode more violently in the coming days and weeks.
Spokesman Sutopo Purwo Nugroho said: “There is a high possibility of an eruption that could be bigger than before.
“A few signs indicate that activity will continue and that yesterday there were a few explosive eruptions.”
The images come as experts warned that a larger eruption is possible – adding that lava rising in the crater “will certainly spill over to the slopes”.
Officials at the Disaster Mitigation Agency said in a statement on Monday that a volcanic eruption is “imminent” though the exact scale remains unclear.
The statement read: “Continuing plumes of smoke are occasionally accompanied by explosive eruptions and the sound of weak blasts that can be heard up to 12 km (seven miles) from the peak.
“Rays of fire are increasingly visible from night to the following day. This indicates the potential for a larger eruption is imminent.”