The ghostly remains of an accidental sea.

A trash dump made beautiful by nature's power.

A 140-year-old castle with underground caves hidden in San Francisco.

The abandoned zoo enclosures offer a perfect place to experience the other side of the bars.

A psychedelic labyrinth on the San Francisco bay.

The rocks in this arid basin leave trails of movement behind them.

A one-of-a-kind collection of a unique medium.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

World's largest collection of serial killer artwork and other macabre exhibits.

An artsy hidden staircase leads to breathtaking views of San Francisco.

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

A huge musical instrument played by the ocean.

This cubist Vienna church building looks like some sort of alien stonehenge.

Collection dedicated to funeral rites, equipment, and mourning rituals of the Viennese.

This Austrian museum celebrates the work of famous forgers and their inimitable imitations.

Macabre museum devoted to historical Viennese murders.

The former private quarters and office of Dr. Sigmund Freud now hosts a museum housing the works of the founding father of psychoanalysis.

The topiary maze at the Habsburg hunting lodge.

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

A small museum filled with over 1,000 clocks, and one particular clock calibrated to run until the year 9999.

One of the best collections of wax anatomical models in the world.

This former insane asylum now holds a pathological anatomy museum.

A tropical paradise just a short trip from the opera house is filled with beautiful winged creatures.