Enormous lake at the bottom of a unique cave system.

In one of America’s oldest mountain ranges, a long-awaited section of a scenic highway is now open to the public.

A recreation of the doomed ocean liner in the middle of the Smoky Mountains.

Knoxville’s architectural icon was the symbol of the 1982 World’s Fair, even catching the googly eye of Bart Simpson.

An abandoned textile mill that is now home to art and concerts.

A lone grave is quietly tucked away in Kanawha Riflemen's Memorial Park.

Thousands of tiny squares in different colors make up this piece of street art.

This rural community has attracted both scientists and techno-refugees due to its federally-mandated lack of technology.

Built in the 1920s, this co-op in the Bronx feels more like an Italian villa than a typical New York apartment building.

It's a pretty creepy lock-up.

This simple convenience store sits on the location where the Ouija board was named—and has a plaque to prove it.

It’s not hard to see why the historic Peabody Conservatory of Music’s library has been described as a “cathedral of books.”

Little has changed in the way that this mill operates since the 18th-century.

An eponymous directional signpost erected by the first president of the United States.

Every autumn, this grove of living fossils erupts in a blaze of brilliant golden-yellow leaves and stinky fruit.

The oldest existing one-room brick schoolhouse in Loudoun County.

This scenic Maryland park was the site of one of the worst prison camps of the Civil War.

The whole world in one water tank.

This pun was simply waiting to come to life, and one defense contractor made it so.

These unusual rooms on wheels are holdovers from the 1960s.

The Corinthian columns that towered over Abraham Lincoln’s inauguration stand proud.

Largest Roman Catholic church in North America.

The little-known, 300-year history of the area includes former lives as a bustling tobacco port, parking lot, and industrial dump.

Before Nixon, "watergate" meant canals.