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

A desert that rolls right up to the ocean, where it's so dry animals live off the fog.

At the foot of a waterfall lies a peaceful swimming lagoon and evidence of over 60,000 years of human habitation.

The royal seat of Henri Christophe, a formerly enslaved man who became Haiti's only king.

Once a bustling fishing port, this semi-ghost town is now more than 90 miles away from the shore.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

An underground paleo-Christian burial site composed of the remains of several cemeteries and Basilicas.

A Belgian self-built tower inspired by the Bible and ancient civilizations.

A long abandoned hospital building on the outskirts of NYC.

An isolated village literally built into the crevices and rock formations of a mountain.

The first declared National Monument in the United States.

The site of many battles and tragedies, including the 40 maidens who leapt into the sea.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

This whimsical castle of grottoes was the labor of love of a French postman, and one of the greatest achievements of outsider architecture.