This former Roman Catholic Church still contains the embalmed hearts and organs of 22 popes.

This large, circular tomb is the final resting place of the first emperor of Rome.

The Pope’s secret escape route.

Over 50 exquisite hand-painted Renaissance maps decorate a Medici storage room.

Go inside to really appreciate this 500-year-old technological masterpiece.

Venice's "Island of the Mad."

This beautiful park on the outskirts of Rome protects the ruins of two colossal ancient aqueducts.

The middle finger of modernity.

The yawning maw of this pagan visage is said to bite off the hands of liars.

The doodles of a genius line the walls of a secret room under the Medici Chapel, where they were hidden for nearly 500 years.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

Feast on twice-cooked goat with plantains and other Haitian street food dishes.

Despite the ever pressing encroachment of urban sprawl this grand New Orleans manse still stands.

The first patented shaved-ice machine heralded a snowy wonderland of iced treats at a favorite New Orleans summer shack.

A theme park that suffered massive flooding during Katrina was abandoned, and now proves irresistible to trespassing explorers.

Once defending the city of New Orleans from invasion by sea, this fort faces an uncertain future.

An abandoned warehouse turned art sanctuary in New Orleans.

Nestled in the woods lies this land art project: a hybrid between park, maze and natural monument.

The 20-mile causeway that separates the Netherlands from the sea.

Rich with fauna and flora, nature-lovers can walk across the sea at this UNESCO World Heritage spot.

A museum-like shop that has been producing clogs, brushes, and ropes for nearly 200 years.

Colorful and chaotic stacked hotel in North Holland.