The Decoy Capital of the World.

This historic lighthouse was well known for the large number of women who served as its keeper.

The meeting of the northwestern corner of Delaware, the northeastern corner of Maryland, and the southern edge of Pennsylvania.

The first marker along the famous boundary.

A rural colonial settlement that contains the remains of a store and cooper.

Although built to generate electricity for Marylanders, this dam has become an all-you-can-eat buffet for American bald eagles.

The longest-covered bridge in the state of Maryland.

This lagomorph-obsessed Route 66 emporium is home to a giant jackrabbit that sits in a bunny graveyard.

An artificial crater field that trained astronauts for lunar exploration.

The highest point in Arizona is an oddly snow-topped peak within the otherwise arid state.

Eons ago, a rushing lava river formed this pristine passage through solid rock.

The final resting place of the businessman-turned-astronomer who helped discover Pluto stands near his observatory.

This Arizona observatory is famous for investigations into Martian life, and as the place humans first spotted Pluto.

Crafted in 1911, this steam locomotive spent its entire working life in Flagstaff.

This 1930s log cabin began as a taxidermy museum but is now a popular country music venue.

Ancient pueblos built into the base of a natural canyon wall.

A planet-hunting astrograph built in the 1920s to seek out the so-called "Planet X" beyond Uranus.

The world's only teal arches exist in a city that cares more about its aesthetic than an Instagram influencer.

An urban laboratory.

These free-roaming horses were once destined to disappear from the land.

Some of the tallest ancient American ruins continue to inspire awe and curiosity.

Stock up on all your horror paraphernalia at this year-round Halloween emporium.

This striking public art installation is suspended above a public park, designed to gently move in the breeze.

A former department store turned into a quirky restaurant.