If it feels like a speakeasy, that’s because it probably was one.

This restaurant offers a side of antiques, curios, and a bathroom chock full of owls.

One of Antoni Gaudí's least-visited works, an homage to Catalan patrimony that mixes neo-Gothic with Modernista forms.

This Great Depression-era creation was once known as the strangest house in the world.

Known as the "Kissing Bridge" for its privacy, it also happens to be the last covered bridge in Ontario.

This iconic sluice gate is a favorite haunt for joggers, fishing enthusiasts, and even ghost hunters.

This innocuous New Mexico storefront was once the secret jump-off spot for Manhattan Project scientists.

A "house to which to flee" for settlers in colonial Pennsylvania.

A forest of immensely tall and unusually straight oak trees planted nearly 200 years ago to build naval ships that never came to be.

The pretty iron lamp is a reminder of the architecture underneath London's streets.

Giant origami sculptures tucked into desert scenery beckon passers-by to explore further.

In a 345-million-year-old cave that's 200 feet underground, dinner awaits.

The debris forms a solemn memorial to those who died in a 1963 accident.

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

New York's oldest magic store.

Maine's oldest diner also happens to win acclaim for its elevated comfort food.

This century-old cinema is complete with musical interludes and boasts a rare projection system.

Europe's official "zero-level," the equator of elevation.

One-of-a-kind museum inside the first Boeing 747-400 ever made.

A museum of carnival attractions where you are invited to ride the rides.

A museum in England’s Lake District dedicated to the trusty pencil wants you to know the story of their World War II spy pencils.

You can row a boat through this ancient underground reservoir.

Two waterfalls flow down the cliff faces decorated with rare natural basalt columns.

This art center located in a former hydroelectric plant uses native plants to create paper for kites, bags, jewelry, and more.