An 18-mile-long tunnel for sewage waste will soon wind within the bowels of Washington, D.C.

Before Nixon, "watergate" meant canals.

A historic arena where the Beatles played their first concert in the U.S.

The towering figures were created from the cemetery's fallen old-growth trees.

Light bulbs, scrap wood, and tinfoil comprise this homemade throne of the gods.

Perhaps the most scandalous statue of America's first president.

D.C.'s first central library was born out of a chance encounter with the philanthropist whose name it bears.

The national park was once a plantation estate.

This leafy estate is worth $18 million and is so grand it has two mailing addresses.

This stunning blue and gold room changed cities twice before becoming part of the Smithsonian.

Franciscan monks created a facsimile of the Holy Land for North Americans who couldn’t afford the trip overseas.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

A Hawaiian stairway to heaven—that you can't climb.

This airstrip atoll is uninhabited by humans, but absolutely full of birds.

A priest with no formal artistic training used basic house paint to create gorgeous religious scenes inside this historic church.

Formerly a lovely white sand beach this Hawaiian stretch is now a trap for countless tons of trash.

Football field-sized microalgae production tanks on the Hawaiian coast create a stunning view from space.

A cooled lava flow from the Haleakalā volcano formed these surreal-looking columnar basalt structures.

Once home to over 8,000 exiled Hawaiians suffering from Hansen's Disease.

This legendary urban waterfall creates a dazzling display of rainbows.

This narrow coastline trail through the dense Kauai wilderness is among the most beautiful and dangerous in the world.

A controversial memorial at the place where Captain Cook met his violent end.

Climbing this abandoned railway leads to breathtaking vistas of O‘ahu.

The southernmost point in the United States is a beautiful place to look at but a deadly place to wade in.