Puerto Rico's oldest rum producer started its 140-year-old business with "a little barrel."

The remnants of this Douglas fir predate Columbus's arrival in North America.

A tribute to the Nirvana frontman hides beneath the bridge that was the singer's beloved hangout spot.

A tribute to the 20th-century ball that cast a spotlight on Mexico’s LGBTQ community.

Legend says the building's unusual features were added at the request of a paranoid president.

These ancient giraffes are the largest known animal petroglyphs in the world.

Local lore says this 700-year-old tree has sacred and medicinal properties.

Mexico's second-tallest monument, now half-hidden in a private residential complex.

Indigenous cultures believed all life would end if this enormous rock toppled.

The ominously named cave is home to some remarkable ancient art.

A "station to nowhere" marks the site of a Siberian subway project that never saw the light of day.

This 41,000-acre wetland complex is the largest marsh in the interior of the United States.

A vibrant portrait celebrates the actress in her hometown.

Old vessels have been transformed into artistic canvases in this unusual cemetery.

The artist behind this historical depiction of transportation remains a mystery.

A tribute to a vessel involved in the notorious Larne gun-running.

A local student's chance encounter with Keith Haring led to the creation of one of Europe's largest murals.

This architectural wonder of Mexico City houses several art schools and national research centers.

A unique music museum housed in a historic Boston theater.

A medieval stronghold rising over the ruins of ancient Roman villas along Rome's southern coast.

The last masonry skyscraper ever built reveals a transitional moment in architectural history.

The remnants of Peoria's proud baseball past stand slightly abandoned, but not forgotten.

The "birthplace of insulin," where Sir Frederick Banting realized the hormone could save the lives of Type 1 diabetics.

The unfinished final resting place of some of Spain's most prominent politicians.