A beautiful but toxic fountain of mercury.

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

Billed as the "largest natural flower garden in the world" this Middle Eastern show field has little competition at 45 million flowers.

This Parisian fountain is a little bit fantasy and a little bit nightclub.

The world's greatest slide descends 18 stories from this looping mountaintop viewing platform.

This historic train station has been converted to a locomotive themed hotel.

Wedged between two buildings at the Great Ormond Street Hospital is this secret music installation.

This odd Chilean waterfall-cano hotel must be entered via a rope bridge.

An earthwork sculpture built by Robert Smithson in the Great Salt Lake only reemerges during drought.

White beach sands made of the remains of tiny, star shaped creatures.

Rent out a glass igloo to watch the Northern Lights like you live in the future.

The sign at the garden gate reads: "These Plants Can Kill."

A walkable map of the world, made from soil and stone by one man.

This stunning Brazilian library contains the largest collection of Portuguese texts outside of Portugal itself.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

Once a prosperous mining village, this tiny Taiwanese town is now overrun with cute cats.

One New Hampshire alleyway has become home to a public gallery of feline art.

On Japan's Tashirojima Island, cats are king.

A magical place that lets you play in and explore the world of Studio Ghibli.

The legendary luxury train passage is commemorated with a charming museum inside its former eastern terminus.

A calico cat named Tama was the wildly popular Super Station Master at this train stop in southeast Japan.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

A popular European tradition makes its way to the states on one of America's most famous bridges.

This ultra-modern California span is actually a titanic solar clock in disguise built by famed architect Santiago Calatrava.