The 2,000-year-old Roman columns are hidden within Barcelona's Gothic Quarter.

An unusual stroll through gentlemen's erotica demonstrates that pornography is timeless.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

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

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

A century and a half of research in the sciences and natural history, still going strong.

San Francisco’s condensed garden of incredible plant growth.

These subterranean storage areas hold emergency water reserves.

A pair of mutilated bronze octopuses slump at the base of the monument honoring California's admission to the U.S.

One of few lasting examples of the brief octagon craze that developed into folly.

This residential door allows San Francisco muggles a glimpse at the wizarding world.

A huge musical instrument played by the ocean.

A collection of memorabilia from the Beat era in the back of a San Francisco bookstore.

No one knows how this Pacific Northwest spruce tree came to have so many trunks.

Thousands of years ago, Indigenous people painted images onto these canyon walls that are still on display today, provocative, mysterious, and enduring reminders of the people who lived here long ago.

A ghost town that held steady longer than most, but finally gave up the ghost.

Eat burgers beneath gargantuan taxidermy and thousands of dollar bills in Utah's oldest continuously-operating bar.

A focal point of in Denver’s skyline for over a century, inspired by a Venetian basilica.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

A technicolor place of worship for Elevationists.

A downtown park built on top of unclaimed graves.

These picturesque Hawaiian falls are home to a rare species of fish that uses a special sucker to climb up cliffs.

This legendary urban waterfall creates a dazzling display of rainbows.