A bas relief commemorates the "Nuns of the Battlefield" who cared for soldiers on both sides of the conflict.

Decades before the scandal, this staircase on the river was a literal "water gate."

An echo chamber with a waterfall wrapped around its base at the Embassy of Canada in Washington, D.C.

A tribute to the pop culture icon overlooks this Washington D.C. intersection.

A 200-year-old bar with a cheeky name claims to have served Edgar Allan Poe his final drink.

This seemingly out-of-place gas station by the Watergate hotel was once described as the most expensive gas station in the world.

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

A gorgeous mural outside a beloved D.C. restaurant pays homage to famous Black Americans.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

A beloved horticultural oasis on the grounds of a wealthy family's former estate.

A somber memorial honors the hundreds of thousands of lives lost at this labor and extermination camp.

If it hadn't been caught in time, a flaw in the design of this Manhattan skyscraper could have led to its collapse.

These light, hollow rolls have been linked to Acadia National Park since the 1890s.

The first bridge observation tower in the U.S. offers one of the best views of Maine.

The world's largest rotating world.

The only intersection in America where the buildings on all four corners were built pre-Revolutionary War.

One man's swirling six-acre monument of stone.

This unacceptably tall building was the real reason for Washington, D.C.'s skyscraper ban.

The sculptor was instructed to add “stallion attributes” to the general's bronze mare.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

An abandoned town is hidden in Great Smoky Mountains National Park.

Gnarled canopies of pink and purple wildflowers arch over the trail to the summit.

This giant iron playfully pays tribute to an early 20th-century architectural trend.

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