The ghostly remains of an accidental sea.

A monument to the art of slicing people open.

A massive underwater sinkhole made famous by Jacques Cousteau.

This mountaintop lake bubbles and steams in a perpetual boil, thanks to its direct link to the Earth's interior.

A rainbow-colored house promotes LGBTQ rights across the street from the Westboro Baptist Church.

When Motown musicians came to Nashville in the 1960s they stayed at this historic record-pressing company because hotels wouldn't host them.

This valley of hot springs and boiling mud pots is home to the record-holding "Geysir," which originated the English word.

The summer tourists on these cliffs are thousands of seabirds.

The picturesque birthplace of Icelandic democracy is drenched in the blood of its brutal past.

This huge pile of volcanic boulders hides a stunning network of secret grottoes.

Turnip-shaped island just off the Michigan shore in Lake Huron.

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

The history of the treatment of mental illness, illustrated in all its gory detail, and housed in an asylum.

Giant eggs, walls of bread, and nightmare surreality mark the largest collection of works by Salvador Dalí.

A museum dedicated to the alleged Roswell Incident.

World's largest collection of serial killer artwork and other macabre exhibits.

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

A Mexican Romeo-and-Juliet-esque legend has given this super-narrow alleyway a reputation for romance.

Mexico's astounding mummy museum with "the world's smallest mummy."

The mortal remains of an estimated 70,000 people lie in the basement of a monastery in Lima, Peru.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

Holy Grotto of Montserrat Monastery holds one of Europe's mysterious black Madonnas.

This house's itty bitty size means no humans allowed.

This cemetery features modernist statues as strange as its name.