Remnants of a Victorian garden feature sitting in public woodland.

A makeshift shrine to the late rock star is still kept up on the nondescript façade outside 1 Logan Place.

A hands-off space for graffiti artists to hone and display their skills.

Catacombs turned marketplace.

Rebuilt remains of a temple to Roman god Mithras.

This South London cemetery holds the remains of more than 15,000 people.

A kaleidoscopic warehouse-maze of handmade neon signs.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

An ordinary lamppost situated in the middle of Cambridge has an unusual moniker and history.

This tree was grafted from the actual tree that led Isaac Newton to ponder the theory of gravity.

Local legend says Isaac Newton built this footbridge without any screws, bolts, or nails.

This offbeat trailer park is home to vintage peddlers, local artists, indie makers, and more.

A "sinister, whimsical, tacky, and really orange" public art installation hidden under a Seattle bridge.

A wall of chewing gum moonlights as collective art.

A colorful architectural gem in Seattle's uniquely modern Central Library.

This semi-secret garden in south Seattle emulates a traditional Japanese garden using the plants of the Pacific Northwest.

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

A walk through the historic city center, under the streets of Seattle.

A magnificent waterfall is also home to the remains of a Roman hydraulic engineering system.

This beautiful park on the outskirts of Rome protects the ruins of two colossal ancient aqueducts.

At the crypt of St. Mary of Eulogies and the Dead you are left alone to ponder mortality among piles of skulls.

This poignant sculpture of a gnarled weapon is a symbol of non-violence.

Where Venice's gondolas go for a tune-up.

This abandoned island off the Venetian coast has been a radical monastery, a political prison, and a secret Nazi base.