This imposing memorial contains the remains of Che Guevara — and 29 other guerrillas who died with him in Bolivia.

A unique form of erosion created an uncanny landscape of boulders perched atop slender columns of clay.

Once a favorite playground for the world's most illustrious guests, Hotel Nacional's secret weapons and bunkers reveal a more menacing side to its golden history.

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

Neo-cave art on the macro scale.

Once an ancient Roman bath, now a hotbed of geothermal energy and a hub for energetic innovations.

This deceiving white sand beach gets its brilliant hue from the chemical discharge of a nearby factory.

A copy of the famous statue can be found in this Florence piazza, along with one of the most breathtaking views of the city below.

Dublin's most modern, visually spectacular bridge is modeled after Ireland's national emblem.

Dublin's "Dead Zoo" serves as a window to Victorian museum design.

Located within a historic park, the beacon is the oldest standing structure in Miami.

Former villa and estate of James Deering developed to preserve native tropical forests.

This bustling Italian plaza is built on the ruins of an ancient Roman amphitheater.

Explore the quarry where the marble was sourced for Michaelangelo's David.

Fortified medieval tower house with lovely roof garden.

This bronze boar's snout has been rubbed to a golden sheen by visitors seeking good fortune.

Geothermal waterfalls in Tuscany.