The ruins of an ancient island city built atop a coral reef in the South Pacific are spectacular and strange enough to have inspired H.P. Lovecraft.

A beautiful waterfall and beach where precious stones are plentiful.

The only retired U.S. nuclear missile silo that is open to the public.

One family's environment-friendly hobbit-house in Wales.

Mine your own precious stones.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

A phenomenal assembly of pueblos in New Mexico is the most complete example of ancient ruins north of the border.

A multi-storied adobe complex has been inhabited for more than a thousand years.

Taos Pueblo recipes, foraged ingredients, and outdoor ovens define the menu at this eatery.

The land is full of geologic eye candy, such as otherworldly spires, mushroom-shaped hoodoos, and prehistoric fossils.

Seemingly grown on some other world, these New Mexico rock formations look like a disused science fiction set.

The old Route 66 town straddling Texas and New Mexico died along with the Main Street of America.

These ruins of a pre-Columbian cliff village are among the most beautiful and well preserved in New Mexico.

"I did this all while you were watching TV."

The official atomic museum of the United States explores the explosive and productive history of a much maligned energy source.

This museum started as a collection of Manhattan Projects and continues to add exhibits as they are declassified.

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.

Relics of Australia's convict past, and a modern scene of unimaginable horror.

A rescue facility that caters specifically to wolf-dog hybrids, and educates about these unique animals.

The remote graves mark the mysterious deaths of four 19th century explorers.

This former iron ore mine comes alive with fascinating stories of its history.

An opal mining town in the middle of Australia where people live, worship, and shop underground.

This off-the-beaten-path abandoned town is a relic of Montana's silver mining boom.

The overgrown ruins of a once thriving World War I-era copper mine.