The small alleys in Lübeck's Old Town are a result of medieval urban sprawl.

Resting on a hill overlooking the coast, these medieval ruins look completely deserted save for their restored chapel.

The celebrated eyesore created by starry-eyed sweethearts.

The video game-themed street art first popped up in the French city.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

This replica of the Greek structure is in the heart of Nashville.

A 22-foot stainless steel quilting needle pays tribute to a local connection to fiber arts.

A collection of outdoor art by renowned muralist Robert Dafford depicts the history of a flooded city.

A visualization of three catastrophic floods that led to the creation of the famed Flood Wall.

A precariously balanced rock perches on the edge of a cliff created tens of thousands of years ago by glacial erosion.

This 19th century granite fortification is one of the most well preserved forts in New England.

The first bridge observation tower in the U.S. offers one of the best views of Maine.

Learn about the history and hopeful future of Maine’s nesting birds at this interactive Audubon facility.

Every plane, auto, and bicycle in this collection is kept in working order and are regularly demonstrated to the public.

Five mythical trolls have taken up residence in woods and hidden on paths at the Coastal Maine Botanical Gardens.

This picturesque abandoned home is rumored to be a spite house.

An eccentric inventor's castle home with its own indoor weather system.

I-95's Tijuana-style celebration of kitsch at the Carolina border.

This quirky UFO-shaped curiosity is often mistaken for the airport’s control tower.

New Zealand's west coast is one of the best places in the world to view these large seabirds.

This strange geological landscape erupts with sudden bursts of water.

Modern art meets modern convenience in possibly the world's most architecturally important public bathroom.

A gigantic sculpture garden is packed with innovative oddities.

These neon green and blue lakes are in the shadow of two huge volcanoes.