California's own medieval Italian castle, authentic down to the 300-year-old iron maiden in the dungeon.

A trash dump made beautiful by nature's power.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

The flow from this waterfall sometimes comes out of springs below its rim.

Trails through lava-carved tube-caves display sparkling bacteria and a rich history.

The oldest orange tree in California spawned a generation of citrus farmers.

California's first suspension bridge.

This massive redwood tree has a hole in the base big enough to drive through.

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

Two mammoth statues inspired by equally tall tales lure tourists to this roadside attraction.

This natural marble cave is one of only five national monuments in Oregon.

This lighthouse has been guiding shipping into the Golden Gate since before the American Civil War.

A historic lighthouse steeped in rumors of ghost and pirate stories.

A monument commemorating the discoverer of radio astronomy.

A pig barn converted into one of the most eclectic residences in Nantucket.

The largest body of water in Massachusetts annihilated four small towns just to slake Boston's thirst.

This delicate museum is devoted to the art and industry that once supported Cape Cod's oldest town.

Two gushing waterfalls of hot spring water within a block of each other.

Hidden for 165 years inside a building designed by Thomas Jefferson are the remains of what may be America's first educational chemistry lab.

Thomas Jefferson's estate is home to hundreds of varieties of historic fruits and vegetables.

This museum-within-a-museum pays tribute to "The World's Most Experienced Airline."

Abandoned power station once home to a squatter community, now being developed into an arts center.

The lasting remains of the region's once booming cement industry.

This small park features a monumental fountain wall, providing a great photo opportunity in the middle of Houston.