This Costa Rican topiary park is a surreal garden of unearthly delights.

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

Hide from the tourist hordes in these relatively unknown, and unguarded lava caves.

These picturesque Hawaiian falls are home to a rare species of fish that uses a special sucker to climb up cliffs.

Watch the newest land on the planet form before your eyes.

Drift through underground caves on a tube.

Dine on ceviche tacos in the sea at this floating restaurant only accessible by boat.

Panorama exhibition hall in old silent theater with a beautiful backyard garden.

The longest continuous lava tube in the continental U.S. offers 2.5 miles of dark explorations for the adventurous.

A favorite haunt of dinosaur loving children and hallucinogen loving hippies alike.

This strange seaside tower got its name from a wealthy eccentric who would hide coins among its stones.

A stunning, two-tiered waterfall made famous by poets, artists and the legend of a ghost dog.

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

The first declared National Monument in the United States.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

Here, at the "world's longest art gallery," you'll find forty miles of ancient petroglyphs and pictographs.

A hand-built folk art installation covered with messages of God's love.

Get lost in this haunting fairytale art walk through a man-made eucalyptus grove.

The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.

Stroll through a wonderland of stupendous moss-covered trees.

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

One man has carved a number of natural New Mexico caves into psychedelic sandstone temples.

Under the right circumstances, this waterfall in Yosemite briefly turns a luminescent fiery orange.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.