A psychedelic labyrinth on the San Francisco bay.

The sign at the garden gate reads: "These Plants Can Kill."

Medicinal spa created with the discharge from a geothermal energy plant.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

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

On Japan's Tashirojima Island, cats are king.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

The centuries-old trees lining both sides of this dirt road may become Madagascar's first natural monument.

The most alien-looking place on Earth.

Statue of death tucked in the University of Medicine courtyard.

An American city stranded at the tip of a Canadian peninsula where strict adherence to the "49th parallel rule" became problematic.

Massive volcano in the Andes is the farthest point from earth's center.

The real place where the One Ring to rule them all was forged.

A bronze kitty adorns the grave of the polar explorer who brought the original feline to the Antarctic.

No one knows for sure why this town's dead refuse to rot.

This picturesque mansion has gone from opulent ruin to nature museum.

This sprawling collection hides many charms.

Over 400,000 birds spend their summers nesting on this small Arctic island.

This Quebec estate is home to the elaborate gardens of a self-taught horticulturist.

The Victorian-era greenhouse is stuffed with tropical plants, and open 365 days a year.

The stunning remnants of this wreck emerge from an otherworldly backdrop of rainforests.

A lake in the middle of the tundra of Quebec is said to be the purest freshwater lake on Earth.

This historic Victorian hotel has a scandalous history of affairs and murder.

A high point in Vancouver kitsch.