Once a lonely sentinel on the edge of the Great Plains, this rebuilt trading fort offers a glimpse of life on the Santa Fe Trail.

Once at the center of U.S. finance, the historic Trading Room was meticulously recreated piece by piece and rebuilt in the Art Institute.

A unique botanical garden housed in three giant geodesic domes.

A multi-storied adobe complex has been inhabited for more than a thousand years.

Conflicting markers on its floor tell a tale of two city centers in San Antonio.

Legend has it the commander of the defenders drew a fateful line in the dirt with his sword just before the final battle.

In Twickenham sits a small whitewashed castle that inspired Mary Shelley's 'Frankenstein.'

Regency-era excess on the English Coast.

The rotting skeleton of a shoreside fun fair that was destroyed by fire and storms still haunts the Brighton ocean view.

The granddaddy of English geoglyphs dates back to the late Bronze Age.

A lush indoor jungle fills this bustling Madrid transportation hub.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

Construction of Barcelona’s iconic (but controversial) church was finally completed in 2026—a century after the death of its architect.

Holy Grotto of Montserrat Monastery holds one of Europe's mysterious black Madonnas.

Modest by day, illuminated majestically at sunset.

A Mexican Romeo-and-Juliet-esque legend has given this super-narrow alleyway a reputation for romance.

Mexico's astounding mummy museum with "the world's smallest mummy."

The splendor of this 17th century golden chapel has led it to be called the "eighth wonder of the world."

These spectacular, symbolic serpents lie within the shadow of the Great Temple.

The only castle in North America to ever house European sovereigns.

City law dictates that this mountaintop cathedral containing the heart of a saint is to remain the tallest building in town.

A massive Montreal stadium that has seen nothing but trouble since its inception.

Chewing gum tycoon's memorial lies perched over wife's botanical gardens on Santa Catalina Island.

The world's first nuclear power plant is open to visitors looking to role-play a meltdown.