Travel Forum - Traveler Mania

1. Kilauea Volcano, Hawaii
 
 
 
 
 
 A photographer slinks into the Pu'u 'O'o crater of Hawaii's Kilauea volcano, which has been active since 1983.
 
 "A lot of the time the lava's flowing into the sea, and you can walk right up to it," said the USGS's Eichelberger.
 
 One of Kilauea's hazards includes the potential for explosive eruptions. "That's when the magma comes flying out as blocks or particles of ash instead of flowing out intact as lava," Eichelberger explained.
 
 What volcanologists call explosive activity varies. "Sometimes they're discrete explosions ... and things go flying all over the place. Other times it's more like a spray from a fire hose," he said.
 
 As a general rule, "it's wise not to be close to an explosive eruption."

9. Redoubt Volcano, Alaska
 
 
 
 Alaska's Redoubt Volcano, which last erupted in 2009  , presents a high risk because of its proximity to the city of Anchorage, its international airport, and the flight paths overhead.
 
 Pictured on April 21, 1990, erupting Redoubt Volcano in 1989-90 sparked volcanic mudflows, or lahars, which swept into an inlet some 13.5 miles (35 kilometers) away.
 
 Ash from the volcano temporarily shut down a 747's engines in December 1989. Though the crew restarted the engines in midair, the incident's aftershocks can still be felt in recent on-again, off-again airport shutdowns related to Icelandic volcanic ash.