An Australian lake whose pink hue defies scientific explanation.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

Two stunning 17th-century libraries and a cabinet of curiosities.

The fairy tale castle of the "fairy-tale king."

Medicinal spa created with the discharge from a geothermal energy plant.

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

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

The hidden "ballroom" under a mansion lake was built by a criminal who ate a cyanide pill during his trial.

Experience architect Le Corbusier's modernist design for living in the home he designed for himself.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.