A fortress off the West coast of Portugal that dates back to 1502.

One Portuguese poet described this cape, the westernmost point in mainland Europe, as "where the land ends and the sea begins."

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

A unique seaside cave where Aleister Crowley faked his own death.

An unassuming music museum recounts the rags to riches story of a dramatic Portuguese genre.

This tile-work piece featuring a chicken riding in carriage is both a remarkable artistic creation and a social commentary of politics and culture in 17th-century Portugal.

Step back in time at this 19th-century kiosk.

The best place in the world to buy tinned fish.

This unique architectural wonder is also tied to one of the 20th-century's most renowned writers.

Hidden beneath a beautiful overlook you’ll find the history of the city depicted in comic strip format next to a pay toilet.

Built in the 1920s, this co-op in the Bronx feels more like an Italian villa than a typical New York apartment building.

Astonishing collection of helmets, scientific instruments, and medical models.

This abandoned ironworks was once the most important military supplier in America.

Reforestation in action is the main attraction in this abandoned quarry.

Collapsing castle on the Hudson river was once the storage site of military surplus business.

Self-sufficient greenhouse floating on the Hudson River.

A waterway covered over after the Industrial Revolution has been unearthed and cleaned up, for the enjoyment of fish and humans alike.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

The front yard of an Upper East Side town house hides the last fragment of one of New York's most famous theatres.

The lesser-known Alice sculpture of Central Park dedicated to the “godmother of American children.”

A quick trip around the globe through an amazing miniature exhibit.

An homage to Jackie Gleason's bus-driving character from 'The Honeymooners.'

A garment factory hides a small Dominican eatery in the hallway to its freight elevator.

Lie in a hammock where George Washington stood.