This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

Metal dinosaurs lurk in a sculpture garden on the outskirts of a popular resort town.

A lightship turned museum, outfitted with artifacts from the vessel's past as part of the U.S. Lighthouse Service.

One tiny triangular park commemorates the victims of a yellow fever epidemic—many of whom are buried right below the grass.

A cement mixer-turned-kaleidoscope in downtown Norfolk offers different views of the city.

This statue is dedicated to Grace Sherwood, the last person in Virginia to be convicted of being a witch.

A sculpture made from recycled materials and hand-blown glass dedicated to transportation and transformation.

This 1967 experiment in modular architecture was designed to be a new model for urban living.

One of Canada's oldest museums, the beautiful Redpath has been serving up Natural History and Ethnography since 1882.

A recreation of the doomed ocean liner in the middle of the Smoky Mountains.

Once connected to the outside world by a single train track, this ghost town is looked after by the National Park Service.

This sprawling collection hides many charms.

A giant bisected onion dome remembers the Iraqis who died in the Iran-Iraq War.

Museum celebrating the ocean, with the largest wunderkammer dedicated to sea exploration.

A miniature train-ride through Slovenia's largest cave system.

An ancient quarry rediscovered by a dog and claimed by biblical kings, a German cult, and the Freemasons.

Art museum based around the collections accumulated over 58 years by one eccentric thrift store owner.

South Carolina's last remaining slavery auction house is now a museum devoted to its own tragic history.

Bigfoot prints, Feejee mermaids, and haunted dolls on display in a tiny North Carolina town.

Town of spiritualists and mediums in Florida.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

A hidden alley in urban Baltimore is a haven for graffiti artists.

Now abandoned, the first public health hospital in the U.S. saw more than one million immigrants from around the world.

A reservoir of vintage pinball machines and arcade games for the nostalgic and thrill seeking.