Nuclear reactor created the plutonium used on Nagasaki.

A 1940s nuclear reactor built to produce plutonium for the Manhattan Project.

A multiversal transit station located right below a highway interchange.

Lines from a walking song are etched into a rock in Natural Bridge State Park.

The largest self-built castle in the U.S., six decades in the making.

Historic funicular railway, believed to be the shortest railroad in the world.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

After sunset the heart of Zanzibar's historic Stone Town neighborhood transforms into a culinary playground.

This rare volcano spews the strangest and (literally) coolest lava in the world.

A salty red wasteland in Tanzania is a breeding spot for endangered flamingos.

Legend says if this neo-Gothic basilica is ever officially completed, the world will come to an end.

An elaborate shrine dedicated to the four corners of the world unfortunately misses its mark.

This kitschy curio wonderland is full of fake animals, teak tables, and a cacophony of random bric-a-brac.

A display of works by one of the world masters sacred art, an 18th-century Brazilian sculptor nicknamed "the little cripple."

The largest open-air contemporary art center in Latin America is a unique experience in the Atlantic Forest.

A stunning Catholic cathedral built by a curve-loving communist in Brazil’s newly created capital.

A short volcanic hill in Quito doubles as a stellar observation point of an iconic statue.

This historic street in Quito is known for its seven stone crosses—and one presidential assassination.

The world's tallest aluminum statue is also the world's tallest image of a winged Virgin Mary.

This 12-inch-tall wooden sculpture of a winged Virgin Mary has inspired much devotion and countless replicas.

Quito's historic, main square dates back to the 16th century.

It took 160 years to complete the most ornate church in Ecuador.

This huge green space packed with activities will make you forget you're in the middle of the Ecuadorian capital.

The gondolas let you glimpse a bird's-eye view of one of the world's highest capital cities.