Travel deep inside of Europe's second largest glacier in the world's largest man-made ice cave.

The seat of Buffalo government is a gorgeous Art Deco palace.

Soaring over 6,000 feet in the Bavarian Alps, this beer garden was once Hitler's 50th birthday present.

Each year melting snow turns these Austrian hiking trails into scuba zones.

No one knows who created the statues or if they are arranged properly—let alone the artwork's real name.

Crawling into this primordial cave may feel disconcertingly familiar.

An ordinary pond with fish from out of this world.

These giant mummies are set ominously into a Peruvian cliffside and topped with real human skulls.

Spanning an elevation of 160 feet and containing 388 steps, this is Seattle's longest staircase.

These Japanese gardens are blankets of light for dark winter nights.

This romantic, decaying 13th-century ruin on the edge of Sherwood Forest is reputedly one of England's most haunted places.

An acoustic anomaly with a mysterious cause.

A trio of giant wooden megaphones turn up nature's volume in this Estonian forest.

This picturesque view of the Scottish Borders was beloved by Sir Walter Scott.

A historic neighborhood church is reborn as a psychedelic arts collective.

A place as enchanting as the journey to reach it is harrowing.

A floating cat sanctuary on an Amsterdam canal.

A medieval replica of King Arthur's legendary table, the Round Table hanging in Winchester Castle was decorated by Henry VIII.

A 19th century family buried their dead among the pines, beneath gravestones styled after ancient Scottish cairns.

Stone carvings record the Norse myth of Sigurd, providing a glimpse into Scandinavia's transition from paganism to Christianity.

What remains of the summer palace of King Kamehameha III.

The ceiling of Prohodna Cave in northern Bulgaria affords a peek at the sky via two deity-sized-eye-shaped holes.