This hill is known for its connection to the occult in Slavic tradition.

Known as the Sistine Chapel of Egypt, this tomb houses some of the most well-preserved paintings in Egypt.

These ancient giraffes are the largest known animal petroglyphs in the world.

A 14th century castle built on the seat of a mighty giant.

This unique wooden mosque resembling a Chinese pagoda was said to be built without the use of nails.

The ominously named cave is home to some remarkable ancient art.

This "living building" on Georgia Tech's campus is home to a blueberry orchard, honeybees, and more than 900 solar panels.

The unfinished final resting place of some of Spain's most prominent politicians.

This supper-club-turned-concert-venue still serves drinks at its original rotating bar.

The "birthplace of insulin," where Sir Frederick Banting realized the hormone could save the lives of Type 1 diabetics.

A historic holy well hidden near a charming English park.

A solemn reminder of the infamous World War II war crime that massacred almost all the men in a small Greek town.

A staircase made of gravestones leads up to this church built into a giant rock.

The massive steel ring looks like it could be China’s first Stargate.

Famed for its pie, this eatery has a hidden tunnel that allowed Catholics to secretly walk to church during the Reformation.

A B.Y.O.B. Mexican cantina lives inside one of the last tortilla factories in Brooklyn.

This castle has links to Portugal’s founding and struggles for independence.

The sweetest graveyard in the world is filled with headstones for dearly de-pinted ice cream flavors.

An out-of-place grove of sequoias thrives in northern Spain.

This Russian religious complex is a Frankenstein's chapel that includes influence from almost all the major faiths.

An unfinished tomb carved into a giant boulder in the Arabian Desert.

One of the Cemestos prefab homes built to secretly house thousands of Manhattan Project workers.

Abandoned for 60 years, this submerged bridge was completely forgotten until the lake was drained.

This museum pays tribute to the Cherokee leader who created a written language for his people.