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

This charming candle shop has been in business since 1789.

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

A simple but powerful tribute to the 20 victims of the 1692 witch trials.

A stained-glass window from the 15th century offers a vision of the end of the world.

Although it appears ancient and mysterious, the quirky folly was actually built 200 years ago by an eccentric estate owner.

A 600-year-old mini shrine guarded by a sword-wielding knight hides in a crumbling cliff face.

Also known as the Square Colosseum, this building is a prime example of fascist-era rationalist architecture.

This large, circular tomb is the final resting place of the first emperor of Rome.

It is the only marker for one of the most famous hate crimes in American history. There are no other memorials for him in the entire state.

An aptly-named street near the birthplace of the modern LGBT rights movement.

On Waikīkī Beach, a monument to four extraordinary individuals of dual male and female spirits who brought the healing arts from Tahiti to Hawai'i.

This small museum explores questions of representation, diversity, and identity.

An abandoned Roman salami factory has found new life as an art space home to 200 squatters.

It was once nicknamed "the most bombed hotel in Europe."

The block of aged dairy is probably still edible after 2,300 years in a peat bog.

The house where the writer spent his formative years.

The comedy and tragedy of Oscar Wilde is preserved in a Dublin park, captured in a sculpture of colorful stone.

An Irish church where an 800-year-old mummy is reaching out of his coffin as if to shake hands.

You've probably seen these distinctive orange-tiled columns on the big screen.

One of the oldest continuously-operated gay bars in the United States is allegedly haunted by Truman Capote and Tennessee Williams.

The final resting place of an iconic drag performer is decorated with pearls and hot-pink lipstick.

The oldest residential street in Europe also features an optical illusion.

Hundreds of caves once used to store grains and animal feed.