The inky volcanic sand leads to reefs teeming with aquatic life waiting to be discovered by snorkelers and divers.

Sacred waters rescued from the wrath of a volcano.

Bali's remote "gateway to heaven" is one of the most sacred places on the island.

One of the most well-preserved temples of ancient Egypt.

Built in the 1850s, this church was of the first five churches constructed in Harper's Ferry.

This shale formation along the Appalachian Trail once inspired the third president of the United States.

Eat the ultimate iteration of Portugal's most beloved pastry.

One of the smallest bookstores on the planet.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

Al Rahmah Mosque appears to "float" atop the Red Sea.

Whitewashed mosque contains the world's largest carpet.

This futuristic building is yet another architectural wonder in Dubai.

Billed as the "largest natural flower garden in the world" this Middle Eastern show field has little competition at 45 million flowers.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

Where thousands of slaves passed through the "Door of No Return."

An ancient and majestic fortress that played an integral role in Portugal's road to independence.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

Through the decades, Black music stars have performed at this historic hub for music and the arts.

The first memorial dedicated solely to the Black troops who fought for the Union.

The little-known, 300-year history of the area includes former lives as a bustling tobacco port, parking lot, and industrial dump.

The world's oldest soul food restaurant is also one of its best.

The United States Capitol's former columns still stand.

This unique religious structure is an architectural gem with arresting ocean views.