This glass skywalk offers vertiginous views down the volcanic cliffs to the beach below.

These small, triangular, colorful houses are a staple of Madeira Island.

Portugal’s highest lighthouse has one of the most impressive focal planes in the world.

One of few vertical lava tubes in the world accessible by foot.

When Azorean green tea meets volcanic hot springs water, a luminous brew is born.

This fairy-tale, neo-Gothic church in the Azores is a world of magical realism.

Europe's oldest still-operational tea farm also boasts a spectacular view.

Legend has it the lovelorn tears of a princess and a shepherd boy formed the blue and green twin lakes in the Azores archipelago.

Bits of flat terrain surrounded by cliffs make one of the most beautiful landscapes in the Azores.

Fascination continues to surround one of history's most infamous shipwrecks.

A steamer run aground near Bimini lives a second life as a playground for scuba divers.

An underwater city for the dead.

After a long career, a disastrous sinking, and a half-successful salvage, this Naval vessel-turned-artificial reef ended up exactly where she was supposed to—with a little help from nature.

Stay in a room with a view... of the bottom of the ocean.

The famous boat that once ferried Bogart and Hepburn still floats in Key Largo after being abandoned for years.

The world's only underwater laboratory where "aquanauts" study oceanic life.

A unique collection of diving equipment spanning antiquity to the present day.

Dedicated to the victims of one of the deadliest hurricanes to strike the United States in recorded history.

This 140-year-old beacon off the Florida Keys marks the wreck of a Navy ship that once roamed the Caribbean hunting pirates.

Island ghost town detailing Flagler's folly in building the Overseas Railroad.

For divers and music lovers, the Florida Keys' Underwater Music Festival provides the best of both worlds.

This legendary "evil" doll has been haunting the citizens of Key West for over 100 years.

The island residents are known for taking their quirky sense of humor with them to the grave.

A monument celebrating the idea of reaching inaccessible places.