At first glance, this Front Street park appears to be only a hot, dry, dusty softball field. But under home plate is the edge of Mokuula, where a royal compound once stood more than 100 years ago -- it's now buried under tons of red dirt and sand. Here, Prince Kauikeaolui, who ascended the throne as King Kamehameha III when he was only 10, lived with the love of his life, his sister, Princess Nahienaena. Missionaries took a dim view of incest, which was acceptable to Hawaiian nobles in order to preserve the royal bloodline. Torn between love for her brother and the new Christian morality, Nahienaena grew despondent and died at the age of 21. King Kamehameha III, who reigned for 29 years -- longer than any other Hawaiian monarch -- presided over Hawaii as it went from kingdom to constitutional monarchy, and as power over the islands began to shift from island nobles to missionaries, merchants, and sugar planters. Kamehameha died in 1854 at the age of 39. In 1918, his royal compound, containing a mausoleum and artifacts of the kingdom, was demolished and covered with dirt to create a public park. The baseball team from Lahainaluna School now plays games on the site, still considered sacred to many Hawaiians.