This museum holds a fully-functional replica of the "Turtle," the first American submarine ever built.

An abandoned Depression-era zoo hidden just off the highway.

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

Amazing views of Long Island Sound can be seen from this mountaintop tower.

The "possessed" house that inspired "The Haunting in Connecticut" book and movie.

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

A lone tower rises above the cliffs in a city park, offering fantastic views of the Connecticut landscape.

Hidden behind a Target are pillows of cooled lava that formed at the bottom of a deep lake in the Mesozoic Era.

From pink dolphins to underwater cities, this museum explores the unseen, mythical world of the Amazon river.

The iconic Manhattan corner that was once the site of the Beastie Boys' fake clothing store.

A fascinating example of the Danxia landform is characterized by its striking red sandstone formations.

The way these carnivorous dinosaurs are posed is an homage to a classic work of paleoart.

A rare specimen of an iconic extinct animal in downtown Sydney.

Over 40 species of fern cover the canyon walls of this lush green bowl, cut off from the bustle of the world by a cave entrance.

This lonesome Monterey cypress has survived centuries of wind, salt, and at least one attempt at arson.

The walls of the statehouse tell the story of Ohio’s prehistoric past.

A former limestone quarry has found a new life as a flourishing community garden.

The fossilized trunk of a tree that grew around 320 million years ago.

A late-19th century diversion canal built by hand crosses Bryce Canyon National Park and is still in use.

Once one of the most polluted caves in America, now an environmental success story and a museum dedicated to caves.

An approximately 500 million-year-old rock outcropping covered in fossilized bacteria.

Archaeologists believe this panel of petroglyphs depicting descending sheep and other figures in Glen Canyon are 3,000 to 6,000 years old.

From Carthage's Hannibal to riders of the Tour de France, many have crossed this scenic route through the Alps.

One of the last remaining structures built by a community of African Canadians in the 19th century.