Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

The spot where Oxford garnered its name was also home to a medieval philosopher and includes a house covered in statues.

This Norman castle was once the site of a Victorian-era prison, and now exists as a luxury hotel.

One of Oxford's greatest treasures likely belonged to the legendary King Alfred the Great.

The beams of the New College, Oxford dining hall come with an amazing story.

This 11th century tower is said to be the oldest building in Oxford.

Hidden in plain sight, this creepy sculpture watches from above.

Oxford University's stateliest library seems designed to make students truly feel the weight of knowledge.

Ancient Egyptian wigs, South American feather headdresses, a bounty of anthropological artifacts in Oxford.

The beloved fantasy novelist is buried near a church containing a whimsical etched glass window full of Narnia favorites.

One of Europe's oldest libraries.

The names Lúthien and Beren can be found inscribed on the shared grave of the famous writer and his beloved wife and muse.

A magnificent waterfall nestled in the heart of the El Yunque National Forest.

Legend tells how a Spanish soldier disappeared from this isolated sentry box without a trace.

This tiny home was originally a narrow alleyway.

This chapel on a cliff is renowned for its healing powers and was founded on the site of a supposed divine intervention.

This limestone cave offers an incredible view of the Río Grande de Arecibo valley.

The world's second largest single-dish radio telescope, once used to contact E.T.

A unique seaside cave where Aleister Crowley faked his own death.

An ancient and majestic fortress that played an integral role in Portugal's road to independence.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

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

An intricately decorated tiny place of worship.

A Gothic-inspired fish market is Gothenburg's best place to find loaves and fishes.