This massive mushroom has spent centuries eating its way across a huge swath of Oregon.

The largest and best-preserved Roman amphitheater in Africa was designed to seat 35,000 people.

This picturesque cliffside beacon no longer calls to sailors but shines once a year in honor of a famous shipwreck.

When waves crash onto this section of beach, the rocks sing a song.

An abandoned railroad tunnel is now filled with bioluminescent bugs.

Every equinox this Maya pyramid puts on a spooky ancient light show.

Once America’s most beautiful army base, this abandoned military fort on the coast of Monterey Bay has been left to the elements.

This rustic cabin, outfitted with gun slits, was once home to John D. Tewksbury, patriarch of the bloodiest family feud in American history.

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

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

Thousands of Mexican Free-Tailed Bats soar around an abandoned storm drain at sunset each summer.

The sumptuous ceiling was one of the last things Charles I saw before his execution.

A rare tour of an aristocrat's private home reveals valuable 17th-century paintings from artists like Rembrandt.

An ancient passage filled with stalls selling used books, once frequented by Vincent Van Gogh.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

Established in 1638 to battle the Black Death, Hortus Botanicus Amsterdam is a treasure trove of rare flora.

Three connected pink triangles memorialize persecuted gays and lesbians throughout history.

A unique collection of gilded age mechanical pianos.

Seven mini rowhouses fill the gap between 54 and 70 Westerstraat.

The third-largest island in Canada is one of the remotest places on Earth.

Castle and secret tunnel withstood a siege until its owner was killed by the Holy Roman Empire, while sitting on the toilet.

The world's largest rose bush has literally outgrown the pioneer museum it was planted behind.

Known as the wettest place on earth.