3 Best Sights in The Monterey Bay Area, California

Built by the Mexican government in 1827 and now California's oldest standing public building, the Custom House was the first stop for sea traders whose goods were subject to duties. In 1846 Commodore John Sloat raised the American flag over this adobe structure and claimed California for the United States. The lower floor displays cargo from a 19th-century trading ship. The Custom House Store sells Monterey-themed items. If the house is closed, you can visit the cactus gardens and stroll the plaza.

The reserve's 1,700 acres of tidal flats and salt marshes form a complex environment that supports some 300 species of birds. A walk along the meandering waterways and wetlands can reveal hawks, white-tailed kites, owls, herons, and egrets. Also living or visiting here are sea otters, sharks, rays, and many other animals.

The sanctuary is a reliable spot for viewing monarch butterflies between November and February. The best time to visit is between noon and 3 pm.