Collapsing castle on the Hudson river was once the storage site of military surplus business.

Centuries-old bridges grown from tangled roots.

A palatial sculpture park was built illegally and in secret by a self-taught artist over 36 years.

This otherworldly palace-mausoleum complex is the stuff eternal dreams are made of.

More than half of this Indian palace is drowned but it looks all the more spectacular for it.

This abandoned fort is said to be the most haunted place in India, so much so that entry is prohibited after sunset.

Thousands of exquisitely carved stone water storage wells, hundreds of stone steps fill this exquisite medieval stepwell.

This restaurant is proud to be built atop a burial ground.

A nearly unconquerable island-fort in the Indian Ocean.

A centuries-old lookout post still sits atop a natural stone spire.

Temples adorned with intricate, erotic sculptures make up one of the "seven wonders" of India.

A centuries-old fortress city lies in ruin.

This complex of vertically-excavated Buddhist, Jain, and Hindu monolithic temples in India's Maharashtra providence illustrates a spirit of tolerance characteristic of ancient India.