This petite park lets visitors see and touch examples of fossilized dinosaur tracks.

A careful eye can find hundreds of dinosaur tracks running along the Connecticut River.

Major tourist destination known for its bubbling mud-pools and hot thermal springs.

The glacier tucked within a New Zealand rainforest.

This strange geological landscape erupts with sudden bursts of water.

Tubing through a cave lit with glowworms is a magical underground experience.

Northern Ireland's Brobdingnagian stepping stones.

Lovingly nick-named the "Brick Dick" this municipal tower was winner of the World's Most Phallic Building Contest.

These grassy undulations on a stretch of University of Michigan campus aren't bad landscaping, they're art.

An ever-evolving wall of graffiti art off East Liberty Street.

The city is full of whimsical portals to another world.

A building so large that it has its own weather.

An 18th-century Spanish watchtower made entirely of seashell and concrete.

One of many gator theme parks, abandoned in the sugar fields of South Florida.

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

Over a dozen Native American earth mounds dating back over 2,000 years dot this Tennessee archaeological park.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

Surprisingly aquamarine waters fill deep lakes formed at the end of the last ice age.

Life-size bronzes of the Grinch, Cat in the Hat, Yertle the Turtle, Sam-I-Am, and the Lorax—and the author himself.

The former home of Samuel Clemens and family remembers the happiest period of the author's life.

A reliquary of pop culture marvels, including the world's largest (and most terrifying) Jack-in-the-Box.

The ancient past meets the retro-future at these dinosaur tracks that are protected by a geodesic dome.