The planet known for having a large number of volcanoes is Venus. Scientists believe that Venus has numerous volcanoes that are mostly shield volcanoes, similar to those found in Hawaii. Many of these volcanoes are thought to be relatively young, indicating that geological activity may continue on the planet today. The thick atmosphere and high surface temperatures, however, make it challenging to study them directly. The planet’s surface shows extensive lava flows and volcanic features, which point to a history of volcanic activity, making it one of the most volcanically active places in the solar system.