Ruins of a German castle on top of a towering stone pillar.

When the rain falls, this drain system turns into a musical instrument.

Over 12,000 hygiene oriented objects and exhibits.

The largest treasure hoard in Europe is contained in a castle that was bombed out during World War II.

This Dresden church was purposely rebuilt Protestant after being demolished in World War II.

A unique hanging cable-car navigates through Dresden, the oldest suspension railway in the world.

The site of Paul Revere's historic two lantern warning.

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

Burial site of the world's most widely known researcher on the endangered mountain gorilla.

France's most famous cemetery, with some of its most curious tombs.

Site of a classic 19th-century physics experiment to prove the earth is rotating.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

This private residence was the template for one of the most beloved television homes of all time.

Olfactory delights in San Francisco's Botanical Gardens.

Not merely a museum – but a whirring powerhouse that offers a subterranean peek into the heart and soul of cable car operations.

A marvel of Byzantine engineering under the streets of Istanbul.

1513 Turkish world map, full of European state secrets and snarky commentary.

One woman’s obsession gave birth to this lovely oddity at the Boston Public Library.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

Haunting and beautiful trees, doomed to die.

An alley covered with 20 years of bubble gum.

A museum dedicated to the history and exploration of both popular music and science fiction.

The only Bahá'í house of worship in North America and one of only a handful worldwide.

Great place to have a drink and a bite to eat in an atmosphere laden with New York's Bohemian past.