Mentioned by Busy Tourist
57 Best & Fun Things To Do In San Diego (California)
"Packed with trails, gardens, museums, zoos, theaters, concert stages and recreational facilities, it’s one of the biggest tourist attractions in the entire state of California. Nature lovers can stroll through dozens of landscapes that include everything from lily ponds to zen gardens. History buffs can take tours through museums, memorials, art houses, science centers and cultural institutes."