Zeppelins are large airships that use gas-filled envelopes to lift off the ground. Named after Ferdinand von Zeppelin, a German inventor, these airships were first developed in the late 19th century. They are typically filled with lighter-than-air gases, such as helium or hydrogen, which allow them to float. Zeppelins were used for passenger travel and military reconnaissance during the early 20th century. Despite their initial popularity, zeppelins faced challenges, including safety concerns highlighted by the infamous Hindenburg disaster in 1937. Today, they are mostly used for advertising, tourism, and aerial photography, offering a unique way to experience the skies.