10 Best Sights in Northeast Coast, Florida

To look at a marvelous Venetian Renaissance–style structure, head to this church, built by Flagler in 1889 as a memorial to his daughter Jenny, who died during childbirth. In addition to Jenny, this is the final resting place for Flagler himself; his first wife, Mary; and their granddaughter Marjorie. The dome of this stunning sanctuary towers more than 100 feet and is topped by a 20-foot Greek cross.

This once-dated attraction continues to undergo a major rejuvenation. There are still fun elements from the original "Old Florida" (admittedly somewhat kitschy), but there's much that's new and exciting, too. The timing is appropriate—in 2013, the park celebrated the 500th anniversary of Ponce de León's arrival. The 15-acre waterfront site is also the location where Spanish explorer Pedro Menéndez de Avilés, in 1565, established the first and oldest continuous European settlement in what's now the United States. Excavations have also shown it was the site of a Franciscan mission to the Timucuan Indians. The park includes a replica of the mission, a Timucuan village and burial grounds, a boatyard in which a 16th-century-style boat is being constructed, and a three-story watchtower with broad, panoramic vistas of the bay, inlet, and Mendez Settlement field. Other highlights include cannon firings; a working blacksmith shop; Navigators Planetarium; a gift shop; a small, elegant café; and the springhouse where you can still quench your thirst from "the fountain of youth."

This historical building has been a hospital, a courthouse, a customs house, a post office, and, during the American Revolution, the home of the British governors. And it was from here, in 1821, that the Spanish governor ceded control of East Florida to the United States to conclude 256 years of colonial control. After a major renovation, the building reopened in 2013 and features revolving exhibits. A shop on-site sells history-related souvenirs and a wide selection of books.

The world's first oceanarium was constructed in 1938, 18 miles south of St. Augustine. This National Register of Historic Places designee, now part of the Georgia Aquarium, has come a long way from marine film studio to theme park to its current iteration as dolphin research, education, and entertainment center. The formal dolphin shows are history, but you can have a far more memorable experience with interactive programs that allow you to swim with and feed the animals or become a dolphin trainer for a day. Programs start from a simple "touch-and-feed" option and are as elaborate as a super-expensive "trainer for a day." General admission allows you to observe the dolphins through 6-foot-by-10-foot acrylic windows. The 1.3-million-gallon facility is home to 13 dolphins, and until 2014 the park housed Nellie, the longest-lived dolphin in human care until her death at the age of 61. A new calf, Coquina, was born shortly after Nellie's death. Other exhibits feature native Florida marine life such as tarpon, sharks, spotted eagle rays, and giant sea turtles, as well as historical artifacts dating back to the park's inception as a nautical movie studio.

The site, north of the Historic District, commemorates where America's first mass was celebrated. A 208-foot-tall stainless-steel cross (purportedly the world's tallest) allegedly marks the spot where the mission's first cross was planted in 1565. Also on the property is the Shrine of Our Lady of La Leche, the first shrine devoted to Mary in the United States. The landscape is exquisitely maintained, and the mission is crisscrossed with paths. A museum and gift shop are also on the property.

Known as the Gonzalez-Alvarez House, Florida's oldest surviving Spanish-colonial dwelling is a National Historic Landmark. The current site dates from the early 1700s, but there's been a structure here since the early 1600s. Much of the city's history is seen in the building's modifications and additions, from the coquina blocks—which came into use to replace wood soon after the town burned in 1702—to the house's enlargement during the British occupation. The complex also includes the Manucy Museum; the Page L. Edwards Gallery and its rotating exhibits; a gift shop; and an ornamental garden.

This tiny 18th-century building of cypress and cedar served not only as a schoolhouse but also as a tearoom, a farmhouse, and a guardhouse and sentry shelter during the Seminole Wars. In 1939, members of the Class of '64 (1864, that is) dressed out the school as they remembered it, and today automated mannequins instruct you on the education of 150 years ago. Apparently teachers had more leeway then because miscreants were given "time out" in a cubby beneath the stairs. And the heavy chain wrapped around the building? It was to hold the structure down during hurricanes. Kids will like the school bell and wishing well in the charming courtyard garden.

At the foot of the Bridge of Lions, this central area of the original settlement was laid out in 1598 by decree of Spain's King Philip II. At its core is a monument to the Spanish constitution of 1812, and at its east end is a portico dating from early American days. This is where products and, regrettably, people were sold, earning the area the twin names of "public market" and "slave market." Today, it's the gathering spot for holiday events, art shows, and evening concerts. Toward the bridge, look for the life-size statue of Ponce de León. The man who "discovered" Florida in 1513 was, apparently, all of 4'11".

The nation's first Ripley's museum is, appropriately enough, in a historic structure—Castle Warden, an 1887 Moorish Revival–style mansion. Like its younger siblings, this odditorium is packed with plenty of unusual items including Robert Ripley's personal collections; a mummified cat; a death mask of Abraham Lincoln; a scale model of the original Ferris Wheel created from an Erector set; and life-size models of Robert Wadlow, the world's tallest man, and Robert Hughes, the world's fattest man.

Built as a merchant's house and store in 1798, the place became a boardinghouse in the 1800s and has been restored to look like it did during its inn days—romantic yet severe, with balconies that hearken back to Old Spain and sparely appointed rooms. Docents lead you around the property; be sure to look at the fascinating St. Augustine street scenes, painted in 1854 by an itinerant artist. Amazingly, much of what you see in the paintings is extant.