The only free-standing, vertical sundial in the US was keeping standard time before it was even invented.

This titanic steel chain linking two buildings was installed without permission but instantly beloved.

This psychedelic tromp l'oeil seems to be beckoning drivers to crash into a wall.

The world's largest fire hydrant is supposedly tornado-proof.

Visitors come from all over to bring gifts and tokens to the grave of Alice, who is thought to have died of a broken heart.

This massive water spout has been luring visitors for hundreds of years, some to their death.

This trio of Australian rock spires may have inspired aboriginal legend or just modern tourism.

Come for the flowers, stay for the bats!

Rumored to be the famed pirate's lookout tower, this historic stone structure is now just watching for tourists.

Earth's tallest volcano is sacred to Native Hawaiians, and home to a dozen world-class observatories.

South Carolina's last remaining slavery auction house is now a museum devoted to its own tragic history.

I-95's Tijuana-style celebration of kitsch at the Carolina border.

This black shoreline is made up of exploded lava particles.

Beautiful Gothic-inspired lighthouse stands out among the run-of-the-mill striped fare on Bodies Island.

The world's largest collection of ticks.

Twenty-eight years after this local landmark was washed ashore by hurricane Hugo, it was washed away by hurricane Irma.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

Visit the monolithic tomb of America's most famous general.

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 site of the deadly Triangle Shirtwaist Factory Fire.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

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

This Costa Rican chapel is the most metal church in the world, literally.