This rare and ancient Christian relic is one of Ireland’s oldest freestanding stone crosses.

A mysterious "wedding cake" castle in the middle of the urban desert.

A mistaken marker makes an erroneous claim along the historic Old Divide Road.

The massive, incredibly rare instrument is over 11 feet tall with a range so deep it goes lower than humans can hear.

A natural history wunderkammer in the middle of the desert.

This iconic 1958 tower welcomes air travelers to Tucson with neon-lit letters and architectural style.

Hike the unusual hoodoos and rock formations that form this little-known natural wonder.

One of the oldest Mexican restaurants in the United States air-dries its trademark beef in a dangling outdoor cage.

Run by members of the Tohono O'odham Nation, this community farm nurtures traditional desert cultivars.

Version of the French Riviera destroyed by the sea.

Two standing giants remain as a tribute to Luxembourg's metallurgical past.

The modern birthplace of Irish freedom.

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

A beautiful but toxic fountain of mercury.

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

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

Walk through the actual strap iron cells and solitary chambers of Arizona Territory’s first prison.

This abandoned Navy base was transformed into an off-grid alternative living community for thousands of people.

A hand-built folk art installation covered with messages of God's love.

At this deceptively beautiful beach, nothing is what it seems.

Huge otherworldly domed rocks on the shore of a deadly lake.

The ghostly remains of an accidental sea.

Semi-recognized center of the world, with many oddities.

From working out of his garage to the James Beard semifinals, one Tucson baker has kept his fan base—and his grains—local.