Colorful Native American paintings are hidden within this small cavern.

The peaceful gravesite of a rugged wild west gunman echoes the touching story of his last days.

A vast city of the dead, where the deceased outnumber the living by more than a million.

The most beautiful Taco Bell in the world even has surfboard parking.

One of the deepest blue holes in the world.

The capital of the Cayman Islands is a center of offshore banking, but gets battered by blistering hurricanes.

Before it was abandoned and left to rust alongside the road, this riverboat starred in a John Wayne movie.

This subterranean oyster house has been the pearl of Grand Central Station since 1913.

A grand Gothic Revival basilica with stained glass depictions of Montreal's religious history has only one soul resting in its crypt.

Lyon's miniature version of the Eiffel Tower was built as a statement in support of French secularism.

An opulent monument built for a duke who donated his entire fortune to the city of Geneva.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

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.

A massive underwater sinkhole made famous by Jacques Cousteau.

A huge, bustling local market in Panama City.

This tree was grafted from the actual tree that led Isaac Newton to ponder the theory of gravity.

One of Oxford's greatest treasures likely belonged to the legendary King Alfred the Great.

This 11th century tower is said to be the oldest building in Oxford.

This slice of 1960s Danish modernism does not conform to the Oxford college stereotypes.

The remains of an ancient bathhouse sit inside this aptly-named pub.

This memorial to World War II's fallen airmen shows us the movements of the stars that once guided them.

Follow the original medieval paths that wind through this intriguing section of the city.

With lush plants and flowers, huge trees, ponds, and hidden monuments, this place feels a bit like discovering Narnia.