This unique sanctuary invites you to interact with the beautiful birds.

These unusual houses look like giant boats that washed ashore on a residential street.

This bewitching Babylonian goddess haunts a hallway of the British Museum.

An eccentric collection of antique items shares space with a prop-quality witchcraft museum.

One of the most spectacular bridges in Spain spans a narrow chasm that divides the city of Ronda.

The hidden ruins of an old hydroelectric plant reclaimed by nature.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

The world's oldest bookshop still in operation.

A garden in Lisbon filled with giant porcelain creatures.

This charming candle shop has been in business since 1789.

Ring the bell to enter a bar that looks equal parts museum and old curiosity shop.

A network of concealed passageways lies within a busy London Underground station.

More than a million titles fill the labyrinthine shelves of this prestigious private library.

This secluded walkway overlooks a magnificently wild London green space.

A Roman spa buried deep beneath the City of London.

Seventeen oak trees sprout from the roof and walls of this tiny chapel without any visual evidence of roots.

This remarkable cave was discovered after a shepherd watched bees enter and exit through a small fissure.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

A castle that was built stone by stone by an eccentric journalist.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

Established in the '60s, a family-owned tropical drink bar founded by Ray Buhen, bartender to the stars.

A cave network located at the southernmost tip of mainland Greece was once believed to be an entrance to Hades.