Behold the rickety glory of one of the oldest roller coasters still standing.

This dramatic rail curve was once the target of a failed Nazi attack.

The largest clock face in the United States is twice the size of Big Ben and infinitely more ad-sponsored.

Sections of the iconic limestone columns have been left uncleaned as a reminder of the city's polluted past.

Hundreds of protractors affixed to surfaces all over the city.

This public park was the site of the largest civilian disaster of the Civil War.

A unique workspace where offices reside on pirate ships and inside gingerbread houses.

A toxic ghost town sitting atop a massive coal fire.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

The ruins of an abandoned church mingle with the graves at Oaxaca’s General Cemetery.

This graveyard boasts a medley of diverse and imaginative funeral architecture.

An incredible collection of Mesoamerican art assembled by one of Mexico's great artists.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

One of the few places where you can visit a cenote and Maya ruins at the same time.

A cenote sitting in the middle of a parking lot shows the Yucatán Peninsula at its most urbanized.

An imposing pair of sphinxes stand guard outside this Egyptian Revival tomb.

The Master of Magnetism dominates the walls of a scrap metal yard to keep graffiti artists at bay.

A model of a dinosaur that was named for Andrew Carnegie stands outside the museum that also bears his name.

Within this beautiful Pittsburgh cemetery, a unique headstone bears witness to one man's eternal love for Jaws.

The last street in Pittsburgh that's paved with wood.

This church in Pittsburgh is home to the largest collection of religious relics in North America.

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

A restored Pittsburgh house of God has been converted to a marvelous house of suds.

Found art has transformed this Pittsburgh neighborhood into a psychedelic dream.