Prayers and messages of hope decorate the ceramic tiles of this pavilion.

This bug-eyed water wheel uses the power of the Sun to clean up Baltimore Harbor.

A collection of huge Pre-Colombian structures in Alabama.

A former Confederate hospital serves as a remembrance of wounded and dead soldiers.

Thomas Jefferson's estate is home to hundreds of varieties of historic fruits and vegetables.

This rural community has attracted both scientists and techno-refugees due to its federally-mandated lack of technology.

The world's largest fully steerable radio telescope.

An ode to one of the dirtiest jobs during the construction of the Boulder Dam.

A Norwegian-born sculptor created these soaring guardian angels at the entrance to Hoover Dam.

Outdoor exhibits explore the contributions of European, African, and indigenous peoples to American frontier culture.

Anna Anderson spent most of her life claiming to be the lost Romanov child Anastasia.

Home to the deepest rift anywhere on Earth.

Don't be surprised if you see a long-necked dinosaur peeking out from among the trees in Northgate Park.

This circus town museum recognizes the outstanding clowns of history.

A massive Montreal stadium that has seen nothing but trouble since its inception.

The Denny Substation has been called "the coolest substation in the world" and sits in a densely populated Seattle neighborhood.

Now housed in a museum, this giant pink elephant stood in downtown Seattle for more than 60 years.

This bike path was sunk below water level for maximum wonder.

A rare festival blending religion, blacksmiths, vagina dentata, sex workers, and the straight-up facts of life.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

A remnant of the last Ice Age, this lake is surrounded by fascinating rock formations.

This lab's maddening silence is good for business but bad for sanity.

Barcelona's historic 19th-century sewers, whose foundations were laid in medieval times, are open to the public for exploring.

This sculpture forces visitors to confront their relationship with space.