The Hawaiian shield volcanoes are the most famous examples.
Shield volcanoes are almost exclusively basalt, a type of lava that is very fluid when erupted.
Shield volcanoes are the common product of hotspot volcanism but they can also be found along subduction-related volcanic arcs or all by themselves. Here are 4 of the volcanoes that comprise the big island of Hawai'i. These are the largest volcanoes on Earth. This is an indication that they erupted from the volcano summit when the caldera was full. Collapse since then has produced the present caldera.