The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

Found art has transformed this Pittsburgh neighborhood into a psychedelic dream.

An abandoned stretch of highway, deteriorating next to the operational one.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

This park contains a number of standing stones meant to heal and inspire.

The remains of a community that was forced to move for a dam that never materialized still rot in this Pennsylvania park.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

Mysterious rocks that ring musically when struck.

This lovely, if imposing, piece of Canadian gothic is possibly the most photographed hotel in the world.

Dozens of houses in the Adirondack Mountains are reminders of a literal "cottage industry" to cure people of a deadly disease.

Two mermen, eternally spitting into each other's mouths.

This stone tower marks a lookout point over the historic Washington Crossing, and maybe some buried treasure.

This strange, big-tailed beast became a Pennsylvania town's unofficial mascot.

A pride of the state, this working museum crafts pottery mosaics in the style of Pennsylvania's earliest European settlers.

Eccentric concrete mansion and museum designed and built by hand from the inside out.

This rock formation named for its unique shape is one of many that call the Alabama Hills home.

This rugged area of red rocks and arches is often considered one of the most beautiful places on Earth.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

Not your typical pet cemetery.

Colorful sand dunes create a unique attraction in this part of Utah's red-rock country.

Although it also features red, orange, and variegated cliffs of Navajo Sandstone, this state park is often overshadowed by its more famous neighbor.

The fifth-longest natural arch in the world, and the longest outside China.