This neon blue river gets its color from a unique mix of bacteria and volcano minerals.

A secret climbing tree hides along the side of a Costa Rican road.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

Featuring a casually threatening atmosphere along with dessert and coffee to die for.

This aromatherapy shop and mini-museum cofounded by the Sigur Rós frontman documents Icelandic history through scents.

The largest whale museum in Europe allows visitors to walk among life-size giants.

Learn about Iceland's hidden folk at this school dedicated to the study of elves.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

This oceanside Reykjavik spot is speckled with recycled sculptures and large stones.

An encyclopedic collection of mammal penises.

This futuristically sylvan church is a glass-enclosed marvel of modern architecture.

St Bernard de Clairvaux Episcopal Church, better known as one of the oldest European buildings in the Western Hemisphere.

12,000 sq. ft. museum tracing erotic art from antiquity to modern times.

An underwater city for the dead.

Florida might be at its most surreal in this museum devoted to the famed Spanish artist.

Possibly the most beautiful carillon in the world, set atop Iron Mountain in Florida.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

An abandoned amusement park based on the popular 1940s Red Ryder comic strip.

This high desert botanical garden is a unique display of Northern New Mexico's geology.

A futuristic temple of light uses prisms and rainbows to create an atmosphere of peace.

These Pre-Columbian petroglyphs contain representations of birds, deer, hunters, and even some early Native flute players.

An authentic replica of an Asian temple and garden hidden amongst the natural beauty of Hawai'i.

Race through the maze, get your name on the sign.

This ancient Hawaiian henge may have been an early star chart.