Robots, lasers, and whoopee cushions, oh my!

A large circus museum with summer performances.

Mary Kelly was last seen here before she was murdered by Jack the Ripper.

Eighty million natural history specimens call this gargantuan museum home.

Scattered throughout London are ancient remnants of the city's former bounding wall.

An incarceration museum on the spot of possibly the oldest prison in England.

A 2000-year-old Roman amphitheater lies just below Guildhall Yard.

In this cobwebbed old operating theater, you can practically hear the screams of the unanesthetized patients.

Hear the quietest sound from across the dome.

The curios of pharmacist and collector Henry Wellcome.

An unusual round church in London with a Templar past.

Rodin's famous depiction of Dante's 'Inferno', amidst a sculpture garden of many of his other works.

From the sky, a kaleidoscope of color brightens the grey landscape of the San Francisco Bay.

This rugged area of red rocks and arches is often considered one of the most beautiful places on Earth.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

Home of the "true" equator.

This stunning mass of ice spans 121 square miles and is still growing.

The inspiration for the Patagonia Clothing logo, Cerro Fitz Roy turns pink at sunrise.

A sanctuary for sickly, stray, or wounded donkeys.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

A beautiful geyser under environmental threat.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

The anatomical-pathological collection of a man who changed surgery.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.