Cruising down Highway 1: An essential PCH road trip

There aren't too many American mansions worthy of being called "castles," but San Simeon is home to one of them. Hearst Castle is just off Highway 1, and it's jaw-droppingly opulent. Completed in 1919, it took over 28 years to complete; with over 170 rooms, it's easy to see why. Plus, the ornate and detailed Renaissance- and Medieval-inspired architecture is unlike anything you've ever seen. And the surrounding area is landscaped to perfection.

The castle has definitely cemented its place in history. The house (and the life of its owner, newspaper magnate William Randolph Hearst) was the inspiration for the classic film "Citizen Cane," and it’s Xanadu mansion. There are various kinds of tours offered, and the guides are both friendly and knowledgeable. The Grand Rooms Tour is the best option for first-timers; you can learn about the history, art, and architecture, and you'll get to see the out-of-this-world Roman Pool. Book tickets in advance!

Dedicated to educating visitors about marine wildlife, the Piedras Blancas Elephant Seal Rookery is a stop everyone will love. Right off the highway, the rookery consists of a boardwalk and other viewing areas, putting you less than 100 feet from one of the most beautiful sea creatures around -- the elephant seal. A non-profit organization run by volunteers, this free attraction is one of the few places in the world where you can safely observe hundreds of elephant seals in their natural habitat. Watch the seals play, splash, and communicate in their distinct style. You'll be entertained by these creatures and their distinctive personalities for hours. When visiting, be sure to go to the elephant seal viewing platform, and also talk with one of the seal "friends" to learn more about these majestic animals.

One of the most interesting houses you'll ever see, Nitt Witt Ridge is a hand-built "castle on a hill" created by garbageman Arthur Harold Beal, otherwise known as Captain Nitt Witt. Starting in 1928, Arthur spent the next 50 years handcrafting the building from beer cans, sea shells, and other found objects. Some parts of the home are allegedly made from stuff from Hearst Castle. With unique architecture that reflects Art's larger-than-life personality, the house is also filled with an incredible collection of knick knacks he collected over the years. It's a folk art icon, a testament to what a dedicated, self-taught, visionary person can make with seemingly nothing. Current owners Micheal and Stacey O'Malley offer guided tours and ask for a 10 dollar donation.

Tucked away on the California coast line, Estero Bluffs State Park is home to a wide range of biological diversity. As with most state parks in California, the park is committed to preserving the extraordinary natural and cultural resources of the state. Home to incredible views of wetlands, bluffs, and a small cove and beach at Villa Creek, there's plenty to see and do here. Hike, surf, fish, or just enjoy the sand. There are also several Native American sites which are fascinating to explore. For most of the year, you can expect to see California wildlife such as seals and sea birds as well!

Built in 1872 by Captain James Cass, the Cayucos Pier is rich in California history. It played a significant role in commercial life for merchant boats coming from Los Angeles and San Fransisco in the early 20th century. While incredibly active through the early 1900s, the pier's usefulness was ultimately diminished thanks to the boom in truck and trains transportation. But thanks to significant investments in renovation, the pier continues to remain a storied part of the Golden State's history, and is a great place to stop and take in ocean views. Keep an eye out for whales; they love putting on a show for their guests.

Another can't-miss California state park, Montaña De Oro State Park is a biker's and outdoor enthusiast's dream. With dozens of trails for bikers and hikers, you'll have a blast exploring what the park has to offer. If you're looking for a great hiking trail, the Point Buchon Trail is the perfect mix of beauty and excitement. In addition to the trails, the coastal views along the cliffs are gorgeous. Many visitors claim the park almost feels like Ireland, with the sweeping ocean views and mild climate. There's plenty of camping here, and if you're looking to swim, Spooner's Cove is a great patch of beach. If you're wondering where it gets the name "Mountain of Gold" from, you need only visit in the spring to see the wildflowers covering the park!