Frank Lloyd Wright built this suburban synagogue late in life, but it stands among his most iconic masterpieces.

The world's oldest Jewish library was founded by Sephardic Jews in 17th century Amsterdam.

Twice a year, visitors can tour the desolate site that birthed the Atomic Age.

The shop where the girl who inspired the beloved character once bought sweets is now a book-themed commercial curiosity.

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

An aeronautical-themed resort forged around rusty relics from the golden age of air travel.

This small roadside eatery exists in both the Northern and Southern hemispheres, as the equator runs right through it.

Known as the Royal Palace of the Euganean Hills, this often overlooked castle has been home for multiple noble families over the centuries.

This African beach is home to thousands of rare mainland penguins that are known for their annoying voice.

Haven for Cape Fur Seals, until the Ring of Death of jumping Great White Sharks arrives.

Over a million items cram the shelves at Africa's largest shop of used and rare books.

One of Western Africa's oldest mosques, this Timbuktu icon has stood for nearly 700 years.

Ancient Manuscripts showcase the civilization of West Africans during the Middle Ages.

Australian Lake set aglow by Noctiluca Scintillans.

An abandoned railroad tunnel is now filled with bioluminescent bugs.

Venice's "Island of the Mad."

The plague quarantine island home to the alleged "Vampire of Venice."

The oldest of Venice's plague quarantine stations, designed to keep the medieval city safe from disease.

This former prison now houses a lovely library devoted to Quebec's oft-maligned English-speaking history.

The central mosque of this Mali town is entirely built from mud.

Acres of natural wonders left behind by a socialite-turned-gardener.

The ruins of the castle that chemicals built.

This stunning sea creature-shaped home blends into the landscape like a fantasy villa.

This nonsensical smiling boat shuttles passengers between two places they could've easily walked between.