A mountain pass in Bulgaria's Balkan Mountains was the site of four historic battles.

This ancient theater, restored in the 20th century, lives on as a venue for dramatic and musical performances.

UNESCO-protected ancient burial ground.

This historic black and white monastery is one of Bulgaria's architectural jewels.

An abandoned saucer-shaped monument in the Bulgarian mountains.

A striking symbol of the Bulgarian capital.

This building has two facades of clashing architectural designs.

Earth's tallest volcano is sacred to Native Hawaiians, and home to a dozen world-class observatories.

The highest point in Washington state is a volcano covered in glaciers.

The short-lived railroad town in central Oregon has been abandoned since the 1930s.

Despite a legend that says this highest peak in Oregon was climbed in high heels scores of people have died on its slopes.

You might know it as the Overlook Hotel, but the inside is not going to be familiar.

Only known mainland rookery of the threatened Stellar sea lion.

This extravagant Art Nouveau rest stop features a million-dollar view of the Columbia River.

The second largest waterfall by volume in the U.S., Willamette Falls is outdone only by Niagara in the amount of water that is pushed northward.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

10,000 flowered plants bloom in the City of Roses.

Tens of thousands of tiny birds swarm into one school chimney every fall.

Portlandia is the second-largest copper repoussé statue in the United States.

This sandstone mansion was the home of two of Oregon's most important pioneers.

The World's First 24 Hour Coin-Operated Art Gallery!! Plastic, Styrofoam, and Elvis--If you can't get rid of it, you might as well worship it!!

The oldest apple tree in the Pacific Northwest.