Joel Waul is known for his unique achievement of creating the world's largest sandcastle. This impressive structure was built in Fort Lauderdale, Florida in 2005 and measured over 28 feet tall. Waul's sandcastle was made from a mixture of sand and water, showcasing his skills in sand sculpting. In addition to his sandcastle, Joel Waul has participated in various sand sculpting competitions and events. His work has garnered attention for its creativity and intricate designs, making him a notable figure in the world of artistic sand sculptures. Waul continues to inspire others with his passion for this temporary art form.