This blowhole is supposedly caused by a trapped monster.

A prehistoric landscape hidden in the cliffs of Maha'ulepu.

A burial ground for workers at one of Hawai'i's largest sugarcane producers that laid buried for decades.

This industrial area was the dumping ground for massive amounts of trash, some of which washes up as tiny bits of sea glass.

This ruined fort and statue are a testament to the last king of Kaua‘i’s savvy diplomacy skills, which briefly brought Russians to Hawai‘i.

A crumbling ghost town on the South Dakota prairie.

A menagerie of concrete animals brought together from across New York City's parks.

Walk down these stairs to get an underwater view of Switzerland's Lake Zug.

Inky sludge oozes to the surface of this beach thanks to a rare natural tar seep.

Make sweet music as you walk through this interactive sonic sculpture.

Kayak out to a floating restroom.

A monument dedicated to the unrecognized Black "mother" of modern medicine.

A museum in the childhood house of a medical pioneer.

A plaque marks the former home of Käthe Paulus, an aerial acrobat who invented the modern folding parachute.

A wonderful and easily overlooked museum tucked in Ohio's Burke Lakefront Airport.

A statue of an astronomer gazes at the sky as a tribute to Caroline Herschel.

This plaque marks the former home of one of the first women physicians in the Netherlands.

A monument to the groundbreaking environmentalist sits near the place where she first experienced the sea.

The history of radiation is on safe display at the foot of a radiation science laboratory.

This biographical museum honors the groundbreaking scientist at her birthplace in Warsaw.

A street in front of NASA's D.C. headquarters has been named in honor of the Black women who were essential to early spaceflight.

A local museum honors the overlooked discoveries of Mary Anning, one of the first professional fossil hunters.

This unusual subway stop was originally a real estate office.

A modern zoetrope on the New York City subway.