Tubing through a cave lit with glowworms is a magical underground experience.

An important Mayan religious and trading center dating back to 200 BC.

A small subculture of boat dwellers keep their traditional way of living alive at this Hong Kong Typhoon Shelter.

This naval gun is fired every day at noon, an odd timekeeping tradition the origin of which is local legend.

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

This popular tourist cave was ignored for almost 200 years before being mined into an attraction.

This staircase in a lush tropical grotto was built by enslaved laborers and renamed to honor Queen Victoria's role in ending slavery in the British Empire.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

Look closely and you’ll notice that the color changes a third of the way up the tower.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

On the waterfront of Sydney, Nova Scotia, a 60-ft. fiddle greets incoming ships.

The final resting place of 121 victims of the RMS Titanic, 42 of which may never be identified.

This lovely, if imposing, piece of Canadian gothic is possibly the most photographed hotel in the world.

This impressive working clock made of 16,000 plants changes its flowers twice a year.

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

This distinctive Crescent City tradition dates back to the days of horse-drawn carriages.

The world-record holder for the longest bridge stretching continuously over water.

Formerly known as National D-Day Museum, this collection commemorates the battles of Normandy and WWII.

In 2010, Nicolas Cage purchased two plots in this cemetery using one to construct this strange pyramid mausoleum.

This symbolic piece of New Orleans architecture is also home to a few ghastly stories.

The oldest cemetery in New Orleans, resting peacefully for over 200 years now.

The final resting place of New Orleans' most famous voodoo priestess.