This historic streetcar system has been running since the 19th-century.

A spectacular tribute to statesman and philanthropist Andrew Mellon.

Inside the cloister of the Temple of San Juan Bautista is a ceiling decorated with gold Baroque illustrations.

An old railroad grade built for the construction of Hoover Dam is now a recreational trail featuring several tunnels and sweeping views of Lake Mead.

For almost 100 years, this site of peace and spirituality has existed on the California coast.

US-50 in Nevada is known as "the Loneliest Road in America," but this earlier iteration of the route is even lonelier.

Semaphore saints, a golden dragon's head, and a stone carved with religious warnings all call this cathedral home.

Built to hold Gold Rush wealth, this building has withstood the test of time.

In one of the hottest parts of the Mojave Desert, shallow bedrock forces the typically dry Mojave River to the surface in this canyon, providing a vital oasis for humans and wildlife.

Napa's oldest building is now a Mexican restaurant.

This Native American settlement dates back to the Pueblo II period.

Fake subway tiles were installed to cover a design that resembled the Confederate flag—it's unclear if the resemblance was intentional.

The first mural ever dedicated to the women of the Black Panther Party.

A remarkable feat of Victorian engineering across the Firth of Forth.

Legend says this sacred tree was a gift from goddess Athena.

These tiered rice paddies were carved into the hillsides 2,000 years ago.

More than 25 fully functional scale replicas of famous lighthouses dot the shores of Lake Havasu.

This rare, carefully curated collection showcases the history of neon inside a grandiose Elks lodge.

This stone once marked the boundaries of Liverpool's medieval markets.

The world's first motel is now an administrative building for an apple farm.

These caves secretly held national treasures during World War II.

A unique museum where guests can rent and operate a locomotive.

This tomb's name derives from a famous painting of a white horse found inside.

The name of the only golden Buddhist temple in Korea translates as "the temple that protects the country."