At the right time of day, sunlight floods through the roof of this cave and illuminates the small pavilion hidden within.

An ancient capital city that dates back 3,000 years old and harbors many surprises.

A haunting theme park is slowly being swallowed by the jungle.

George Martin's Caribbean recording studio now rots within the shadow of an active volcano.

This whimsical garbage disposal facility receives around 12,000 accidental tourists each year.

The largest drain hole in the world.

The fading, forgotten remains of a once bright and booming factory.

A colorful "forest" made entirely from three tons of recycled plastic waste.

Hopeless romantics will swoon over the sweet story behind this bright and colorful home.

An Australian lake whose pink hue defies scientific explanation.

A psychedelic labyrinth on the San Francisco bay.

An eerie, derelict amusement park in Berlin.

An emerald-green grotto just a short trip from Austin.

Rippling sand dunes frozen in the Arizona rock.

On Japan's Tashirojima Island, cats are king.

Week-long block party becomes a competition for the best decorated street.

Crumbling remnant of Rio's colonial past tucked behind Corcovado mountain in the neighborhood of Cosme Velho.

One of São Paulo's tight urban intersections has become a haven for graffiti artists ever since a single Batman started the trend.

Part of one of the largest flooded cavities on the planet, and littered with prehistoric animal bones.

Art school in the Amazon: Drugs, nature and sustainable agriculture.

A remote candy-striped mountain in the Peruvian Andes straight out of the pages of Dr. Seuss.

These steeply terraced ruins are a stop along the Inca Trail to Machu Picchu.

An Archaeological Wonder of Peru, and the largest stone ruin site in the New World.

The "Skinny House" is made from scrap, salvage, and a neighbor’s kindness.