Maine's oldest diner also happens to win acclaim for its elevated comfort food.

The world's last remaining store of its kind.

A bronze tribute to a legendary Californian, the self-proclaimed "Emperor of the United States."

This cemetery overlooking the Benbulben rock formation is the final resting place of one of Ireland's most beloved poets.

The "Black Arch" guards the entrance to the picturesque Glens of Antrim.

The hero of the women's suffrage movement birth home is now a museum dedicated to her legacy.

Legend says this ancient pagan site can cure all ailments.

This site commemorates the former inn and restaurant where the chocolate chip cookie was first crafted.

A serene plaza that commemorates one of the Granite State's most iconic figures.

This defunct, fortress-like prison has been the setting for several movies.

This park contains one of the largest concentrations of cedar glades, a unique and rare ecosystem.

All you ever needed or wanted to know about America's favorite whiskey, but not a drop to drink.

This replica of the Greek structure is in the heart of Nashville.

Over a dozen Native American earth mounds dating back over 2,000 years dot this Tennessee archaeological park.

In the 19th century, this was the center of Boston's Black community.

The building features one of the last remaining free-floating spiral grand staircases in the U.S.

At the center of this cemetery stands a 2,000-year-old burial mound of the Adena culture.

One of the world’s largest collections of petroglyphs records 2,000 years of human activity.

A 19th-century cabin built into a hollowed-out Sequoia tree.

This volcanic plug boasts the longest recorded history of any Scottish stronghold.

An ornate private entrance to the Vienna subway built specifically for the emperor.

A medieval abbey featured on 'Game of Thrones' that dates back to the 12th century.

Plaques on its facade commemorate the Tiber's most destructive deluges.

A brief journey through early 19th-century pioneer life across Linn County.