A French valley with forests so lush it was nicknamed "the Small Amazonia of the Pyrenees."

The world's first hotel built in an abandoned water-filled quarry.

An underwater restaurant, surrounded by a coral reef.

A grand Gothic Revival basilica with stained glass depictions of Montreal's religious history has only one soul resting in its crypt.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

The sound of swaying stalks in this stunning grove has been named a governmentally recognized sound.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

A psychedelic labyrinth on the San Francisco bay.