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

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

Steadily reminding Czechia of its past.

Copenhagen's celebrated theme park and gardens.

Massive still life just off the highway in Kansas.

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

The tallest hotel in Europe.

One man's ambition created this psychedelic log home.

Fortified medieval tower house with lovely roof garden.

Swedish skyscraper with a 90° twist.

The old observatory in Copenhagen has a spiral corridor used as a racetrack.

Romania's triumphal arch looks out over Bucharest.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

The only structure left with direct ties to the Salem witchcraft trials of 1692.

Statue in Salem of the woman who starred as the witch Samantha in the sitcom "Bewitched."

The inspiration for H.P. Lovecraft's horror stories and Batman's Arkham Asylum is now a condominium complex.

An architect's childhood fantasy treehouse made real.

Devilish landscape, once cinema home to giant alien bugs, now derelict roadside attraction.

A beautiful geyser under environmental threat.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

When ecosystems collide in the arid Southwest.