A massive underwater sinkhole made famous by Jacques Cousteau.

In Egypt's expanding metro area, many of the neighbors are dead.

An old slave lookout in Cuba's historic sugar cane fields.

This communist country can still appreciate its fragrant past.

A focal point of the Cuban government, this city square features one of the most iconic images in the country.

This subterranean disco dance club in a Cuban cave comes with bright lights and a dark legend.

The largest whale museum in Europe allows visitors to walk among life-size giants.

The oldest church in Iceland is one of the few to feature ornate decoration.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

Medicinal spa created from the mineral-rich runoff of a geothermal power plant

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

A sculpture serving as an homage to Pope John Paul II.

A 19th-century architectural wonder designed by the "father of the skyscraper."

Soaring over the Niagara Whirlpool since 1916.

This Niagara Falls tourist trap is a world bright with neon and curiosities that will inspire love, hate, or a mixture of both.

Ancient snack bar of the Roman Empire re-opened.

Erotic art covers the walls of the largest ancient pleasure palace.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

The glowing blue Nymphaeum of Emperor Tiberius.

This narrow coastline trail through the dense Kauai wilderness is among the most beautiful and dangerous in the world.

Football field-sized microalgae production tanks on the Hawaiian coast create a stunning view from space.

A controversial memorial at the place where Captain Cook met his violent end.

These ancient sacred grounds granted amnesty to those who managed to reach them.

Watch the newest land on the planet form before your eyes.