Once home to more than 50 displays of freshwater fish.

The only natural lake in the world that drains into both the Atlantic and Pacific Oceans.

This rock was donated to the museum by an inspired young visitor.

The randomness of this wall of lava lamps helps encrypt up to 10 percent of the internet.

The "worst battleship ever built" is enjoying a grand second act, submerged 30 feet in the Gulf of Mexico.

Dine inside a giant caterpillar at this community-run eatery.

This 12-seat movie theater is the smallest in the world.

The cliff and rock formations are made out of Sioux Quartzite.

This churchyard arbor is surrounded by hundreds of gravestones placed there by author Thomas Hardy.

According to legend, King Arthur killed a beast that dwelled beneath the waters of this Welsh lake.

A historic bridge no one is allowed to cross.

A cemetery in Barcelona's Poblenou district is home to this touching funerary statue, which depicts death in the form of a winged skeleton.

Near the summit of Mount Washington, a stone monument remembers a life lost to one of the mountain's infamous storms.

A 16th-century horror show built in a lovely Italian garden.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

The bookstore with bookshelves built into unlikely places.

A relief that wraps around the concourse of Los Angeles's World Trade Center marks one of the city's failed urban design plans.

The building features one of the last remaining free-floating spiral grand staircases in the U.S.

One of the largest pieces of scientific equipment ever carried on a NASA space shuttle sits in a Chicago alley.

This massive metal sculpture in the shape of a folded paper airplane overlooks a Utah mountain.

This small archipelago in northern Lake Superior was formed by a massive meteorite impact 450 million years ago.

Dive for drinks at Croatia's first and only underwater winery.

It's unclear what caused the fire that led to this opulent hotel's demise.

Beirut's thinnest building was the result of feuding brothers.