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

This abandoned five-star hotel is now a five-star urban exploration destination.

Legend has it the lovelorn tears of a princess and a shepherd boy formed the blue and green twin lakes in the Azores archipelago.

One artist's collection of homemade handicrafts doubles as a monument to 20th-century material culture.

Europe's oldest still-operational tea farm also boasts a spectacular view.

Dublin's most modern, visually spectacular bridge is modeled after Ireland's national emblem.

The somber sculptures commemorating Irish Famine on the river Liffey in Dublin.

The world's only flying boat museum honors a small Irish village that sent 20th-century aviation to new heights.

This short bridge is the only thing connecting a tiny Irish island to the mainland.

The ruins of this medieval castle in Northern Ireland have inspired artists from C.S. Lewis to Led Zeppelin.

Northern Ireland's Brobdingnagian stepping stones.

Singapore's landscaping project is home to 18 incredible Supertrees.

The largest pool at its elevation sits on top of one of the most expensive resorts in the world.

This statue once earned the distinction as one of the "Three Major Disappointments of the World."

This Singaporean food-court stall was home to the world's cheapest Michelin-starred meal.

A graffiti Mecca welcoming artists from around the world.

A little lighthouse in New York City, surrounded by mysterious stories of insanity-driven construction.

A former insane asylum despised by Nelly Bly and Charles Dickens is now fashionable apartments.

Site of the first pathological and bacteriological research facility in the United States.

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

One of only two commuter aerial tramways in the United States.

A touching tribute to the "Queen of Soul."

A popular European tradition makes its way to the states on one of America's most famous bridges.

Set sail on a small scale.