One woman's Viking Castle on Lake Tahoe.

When Azorean green tea meets volcanic hot springs water, a luminous brew is born.

In a quiet north Chicago neighborhood rests a stunning relic of the golden age of earthenware design.

A steep and winding road in the Yorkshire Dales passes by these deep natural potholes.

These hellish-looking cliffs in the Canadian Arctic have been burning for centuries.

Spend the night in this formerly abandoned traditional Scottish village.

Along the historic Mother Road is an old gas station with a secret counterfeiting past.

Portugal’s highest lighthouse has one of the most impressive focal planes in the world.

Rainwater transformed this old quarry into a peaceful pond you won't find in most tourist books.

This fairy-tale, neo-Gothic church in the Azores is a world of magical realism.

This abandoned five-star hotel is now a five-star urban exploration destination.

A perfectly circular lake is formed by the crater of an ancient underwater volcano.

This Costa Rican chapel is the most metal church in the world, literally.

These mysterious ancient stone spheres were created by a civilization lost to time and are now mostly lawn ornaments.

Where dogs like the rare "Fire-Tailed Border Cocker" run free on the mountainside.

This neon blue river gets its color from a unique mix of bacteria and volcano minerals.

Sloth rehabilitation center in the jungle of Costa Rica.

A former suicide bridge is now accumulating symbols of love instead of a body count.

A botched 18th-century canal silenced one of Sweden's most magnificent waterfalls.

Despite the groans of archaeologists, this astounding groups of Bronze Age petroglyphs have been painted red for tourists.

According to legend, this boat-shaped henge is built over the grave of a mythic king.

A man has revenged his true love's betrayal through tears and stone genitalia.

A former top secret military tunnel is now stuffed with snow and open year-round to skiers.

Hundreds of hopeful gold miners came here to get rich, but only two years later the small town was deserted.