Earth's tallest volcano is sacred to Native Hawaiians, and home to a dozen world-class observatories.

This sprawling collection hides many charms.

A humid oasis combines recreation with exploration in a unique underwater cavern.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world’s largest coastal brick fortresses.

A monument celebrating the idea of reaching inaccessible places.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

A historic presidential getaway on the continental United States' southernmost island.

Here’s how Robert the Doll earned his reputation as the most haunted doll in the world.

The museum chronicling a treasure hunter's dream, fulfilled.

Like Mardi Gras, only everyone's a pirate.

Welcome to old Florida, where a 1940s mermaid show is still enchanting visitors.

Canada's subterranean Cold War museum has doubled as a movie set.

Louise Bourgeois' 30-foot-tall steel spider sculpture.

"Respectful to the dead, safe and sanitary to the living, dedicated to the Genius of Memory..."

An 18th century wonder of the world, lost in WWII, re-created at the Catherine Palace.

A model village fit for an emperor.

A Russian museum dedicated to the household staple, the samovar.

Gargantuan home of Russian science.

Museum celebrating the achievements of the Soviet space program.

Immortal combat in a Moscow museum.

A sculpture park of the tossed aside relics of the USSR, from Stalin to a massive Soviet emblem.

Dozens of padlock-trees along the Moscow River.

Thirteen sculptures in central Moscow graphically depicting vices of the modern world.

Moscow's imposing monument to the Space Age.