A collection of 20th-century automata, penny arcade games, and musical contraptions.

Tiki luxury on Nob Hill.

A museum befitting the city responsible for supplying the majority of the world's LSD.

Its buzzing collection honors vibrator history.

A psychedelic labyrinth on the San Francisco bay.

A huge musical instrument played by the ocean.

Feed it cash, get your very own gold bar.

A preposterously luxurious hotel with gold-plated iPads, Rolls Royce chauffeurs, and a staff that trains by watching "Downton Abbey."

Planned as the world’s first zero-carbon city, it had lofty ideals—but is only 5 percent completed and aiming for 50 percent carbon-neutral.

This artificial archipelago was supposed to resemble a map of the world.

A faithful reproduction of Al-Jazari's enormous water clock.

Sitting atop a rock on Michamvi Pingwe beach, this restaurant becomes its own island at high tide.

Artifacts showcasing the witchy history of Zambia.

If you've ever wanted to tear Hello Kitty apart with your teeth, this is the place.

Remnants of the most densely packed city in world history, that thrived on anarchy for 30 years.

This hulking behemoth is actually five interconnected towers built in the 1960s.

A crazy maze of a hostel, where every trap door and secret entrance brings you to a new wacky, wonderful room.

Annual street carnival celebrating Indonesian heritage.

A monster in the plant world, up to 10 feet tall and smelling of death.

A mud volcano in Indonesia spews out 50,000 cubic meters of mud every day.

Bright Indonesian villages painted in a rainbow of competing color schemes.

A real-life "hobbit" cave in Flores, Indonesia.

Three wildly colorful calderas top this otherworldly volcano chain.

This tiny lake temple dedicated to a water goddess seems to float on the surface.