Statues of Ramona Quimby, Henry Huggins, and Ribsy the dog in the park where their adventures "really happened."

Not-so-fearsome tiny trolls live under this wooden train trestle in Portland.

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

Barcelona's only remaining tram system takes riders to the Tibidabo funicular.

Built to test magnetically levitated elevators, the tower also boasts Germany's highest visitor platform.

Experience architect Le Corbusier's modernist design for living in the home he designed for himself.

This forgotten boat elevator was an engineering marvel in its heyday.

Toxic waste disaster that founded the Superfund program.

Twice a day one of these tragic bronze mariners drowns with the tide to remember all those the sea has taken.

Italy's third-largest Roman arena gives a peek into the underground operations beneath the ancient spectacles.

What was once a unique system of urban elevators is turning into a mechanical ruin.

This sandwich shop has a century-old elevator behind a sheet of plexiglass.

This little medieval church hidden in the center of Yerevan was lost and rediscovered—twice.

She asked for a potato cellar and over the next 23 years he gave her a network of holy caves.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.