This black shoreline is made up of exploded lava particles.

An underground magnet for ever-changing street art.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

A naturally mummified 2,000-year-old man.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

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

Take shelter from Hawai'i's tropical heat under the massive canopy of largest Banyan tree on the island.

An unusual round church in London with a Templar past.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

A building so large that it has its own weather.

One part local history, 99 parts gruesome haunted house.

Eighty million natural history specimens call this gargantuan museum home.

Hear the quietest sound from across the dome.

Originally envisioned by King Ludwig II to rival Versailles, Herrenchiemsee's "New Palace" remains half-gilded for lack of funds.

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

Sitting in the basement of a castle, the largest wine barrel in the world is bigger than most apartments.

This lurid German fountain plots the sad course of marriage from dating to death.

A castle from the Holy Roman Empire that hosts traveling youth... in its stables.

Among the ostentatious rococo ornamentation of this church, an image of death cuts the life-thread.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

The fairy tale castle of the "fairy-tale king."

Guests can stay at a hotel in the former French abbey where lie the tombs of King Henry II and King Richard the Lionheart.