Once close to extinction, there is no shortage of elephant seals on the beaches of Año Nuevo State Park.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

One woman's Viking Castle on Lake Tahoe.

An historic and oft-filmed spot for musclebound iron pumpers on the Pacific coast.

Home to items never before seen by the public.

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

These unusual rooms on wheels are holdovers from the 1960s.

The Aldie Gristmill was once the largest factory of its kind in Loudoun County.

Named for a Greek oracle that interpreted the words of Zeus, this beautifully-restored manor home was once home to the architect of the Marshall Plan.

Forget Hollywood, one of the biggest stars in the world can be found in Roanoke, Virginia.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

These secluded and abandoned anti-aircraft defenses have become one the most scenic viewpoints in Barcelona.

Mountain where Jesus was first tempted by the Devil.

Giant topiary dog once played a role in a terrorist bomb plot.

Hundreds of stone stairs and a winding medieval bridge connect this haunting Spanish island to the mainland.

The atmospheric ruins of a historic church can be found on a hill above the city of Oviedo.

The much-loved protagonist of famed Argentinian comics can be found sitting on a park bench.

Considered by many to be one of the most dangerous highways in Alaska.

The king of U.S. high points towers over every other peak on the continent.

This former fire tower is now a rustic observatory that offers amazing views of eagles, hawks, and the Appalachian Mountains.