Water of undetermined depth has attracted rare fish and cult leaders alike.

A prehistoric landscape hidden in the cliffs of Maha'ulepu.

A burial ground for workers at one of Hawai'i's largest sugarcane producers that laid buried for decades.

The largest man-made crater in the U.S. marks the spot where we once tested mining with nukes.

A once grand hotel is being retaken by the wilderness it once capitalized on.

In 2018, Pohoiki Road was severed by lava flowing from the eruption of Kilauea.

The sinister ruins of one of the worst dam failures of the 20th century lie in this astonishing alpine setting.

The best-preserved beehive tombs in Oman with spectacular backdrop.

This lovely little burbling creek is actually a deadly waterway that has dragged down everyone who ever set foot in it.

The pretty iron lamp is a reminder of the architecture underneath London's streets.

The alleged vampires after which these islets are named may have actually been plague victims.

What if the cure for all that ails you was as simple as repeated exposure to low-dose radon?

Luminaries of all stripes have sipped strong Greek coffee at this cafe since 1839.

This otherwise innocuous bodega was once the headquarters of the most feared assassin's guild in American history.

An acoustic anomaly with a mysterious cause.

A network of concealed passageways lies within a busy London Underground station.

The highest bridge in Myanmar was once the tallest railway bridge in the world.

According to legend, this tomb holds the secrets to time travel.

The second-longest continuous wall on the planet protects a hidden secret in the deserts of India.

The 953 windows undoubtedly make this the world's most beautiful screened porch.

This overlooked street light once served as a KGB dead letter box.

A multiversal transit station located right below a highway interchange.

This colorful palace is an oasis of calm amid the hustle and bustle of the Buriganga riverfront.

Mosques carved from coral and dozens of well-preserved stone structures fill this 500-year-old Swahili trading center.