A lovely aquatic park built by a one-armed Civil War veteran who made a fortune from lotuses.

Order cookies baked by cloistered nuns in a 400-year-old monastery.

The location where the American Revolution ended.

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

This giant sculpture made of trash is a critique of society's wastefulness.

Elaborate tile work in this railway station tells the story of Portugal.

A hidden three-foot-wide house separates these two regal churches.

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

This restored Portuguese cafe may well be the most beautiful place in the world to grab a Big Mac.

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

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

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

An ode to "The Queen of Appalachia."

Once seen as a bit of an eyesore, this sculpture has become a staple of downtown Houston.

This titanic steel chain linking two buildings was installed without permission but instantly beloved.

This psychedelic tromp l'oeil seems to be beckoning drivers to crash into a wall.

An oft-overlooked, magically musical monolith that stands majestically between Arlington Cemetery and the Iwo Jima Memorial.

An opulent monument built for a duke who donated his entire fortune to the city of Geneva.

Overlooking the Colorado Convention Center is this giant sculpture made from thousands of triangles.

In Houston's airport, a cow is properly equipped to jump over the moon.

Built for an exposition in 1915, these horticultural displays have stood the test of time.

An abandoned textile mill that is now home to art and concerts.

A local scoured more than 1,000 acres for stone to create his masterpiece.

One of the few surviving "Wigwam"-themed motels.