A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

Ring the bell to enter a bar that looks equal parts museum and old curiosity shop.

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

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.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

A former connection to City Island, it has been abandoned since the 1930s.

This eclectic sculpture garden in Brooklyn, home to a bizarre collection of art, was once a run-down junkyard.

A hidden lane full of top-quality street art.

Eight whimsical acres of metal art.

66,000 pieces of art, donated by one of the world's richest men.

Two New York rooftops are home to the largest rooftop soil farms in the world.

Read between the lines of the subway map to find the hidden abandoned Civil War fort.

The largest stone moai on Rapa Nui.

These aggressively sustainable art homes look like something out of 1970's science fiction.

Seemingly grown on some other world, these New Mexico rock formations look like a disused science fiction set.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

The land is full of geologic eye candy, such as otherworldly spires, mushroom-shaped hoodoos, and prehistoric fossils.

Walking around West Harlem reveals a scavenger hunt of beautiful bird murals.

Marvel of green building techniques that sings with the wind.

Home of Philip Johnson, one of the 20th century's most influential architects.

You can row a boat through this ancient underground reservoir.

This lower Manhattan bar is set up in an old bank vault that rests beneath a skyscraper that hides even more historic splendor.

This beautiful building in the heart of Manhattan's Financial District was empty for decades.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."