Eat the ultimate iteration of Portugal's most beloved pastry.

The best place in the world to buy tinned fish.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

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

Every year model trains zip through a miniature New York City that's now 150 landmarks strong.

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

One man's remarkable private collection of art from around the world.

The medieval castle built as headquarters for the Pope's secretive Knights Templar.

Little Red Lighthouse under the George Washington Bridge.

"A hideous albatross in the Hudson River Valley."

An abandoned 19th century quarry in the middle of the woods, remade by unnamed wanderers into a massive series of rock thrones.

The Hudson River School comes alive at this palatial estate.

Named the fifth most beautiful building in America in 1885, this former courthouse boasts the best view in the Village.

Once a popular watering hole among longshoremen and shipyard workers, this neighborhood treasure spans more than 100 years of Red Hook history.

One of the most enjoyable bits of history at Coney Island and “the most romantic ride in the world.”

A wooden rollercoaster that still delivers a thrill.

New York's southernmost subway station is whimsically wavy.

This 19th-century clock has been restored to help withstand the harsh environment of its seaside home.

The name of this tiny pocket park tucked between two buildings on Manhattan's Upper West Side is Latin for its location: "seventy-one."

A symbol for the opposition to nuclear power around the world.

This colorful artistic feature atop a Danish art gallery allows visitors to stroll through a rainbow.

At these downtown crossings, pedestrian lights show axe-wielding Vikings instead of the usual walking figures.

Climb to the top of its spiral spire for spectacular views of Copenhagen.

This bridge's unique architecture honors nautical heritage and encourages self-awareness.