The house of a former Argentinian president stands protected within a large glass case.

The narrowest house in Buenos Aires is less than 10 feet wide.

These small sculptures pay homage to the lovable star of an iconic Argentine comic strip.

A gateway to a mysterious network of underground tunnels.

The final resting place of the liberator of Argentina is guarded around the clock by two soldiers.

According to local history, this cast-iron canine was nearly melted down for bullets during the Civil War.

A uniquely lettered street sign marks the corner where the iconic word game was invented.

A hidey-hole sandwiched between cellphone, DVD, and jewelry stores features Tibetan delights.

This mysterious marker puzzles pedestrians and infuriates geographers.

Nine nice parcels of land along a flight path offer a quiet respite... until a plane soars overhead.

Some of New York's best tacos can be found in the back of an unassuming bodega in Queens.

A collaborative art project that transformed a neighborhood in NYC's Queens.

The graveyard holds the remains of Irish immigrants who arrived in Queens after fleeing the Great Famine.

A whimsical, but often overlooked clock in Park Avenue.

Cryptic messages embedded in the New York City sidewalk.

The first museum in the United States dedicated entirely to posters.

Stunningly detailed mosaics in a New York subway station bring life to the Weimaraners of artist William Wegman's work—and to thousands of commutes.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

An institution dedicated to the towering buildings that make up skylines in New York City and around the world.

Rummage through this sunken ship, but leave your scuba gear at home.

Its appearance in "Game of Thrones" may spur on the long-awaited restoration of this medieval shipyard.

The final resting place of the great navigator, or maybe his brother.

The world's largest wooden structure.