Seven (Plus Sev'ral) Asea: Famous Ships (Some Fictional) Set Sail for Storied Ports of Call with an Array of Colorful Characters Aboard -- All Delineated In Verses Always Including a Minimum of Seven Letters Abecedarially Determined

On Attic Jason's Argo, Abner's off to Angkor Wat. 
"I'm so at sea, Ma," argues he. Ma answers, "No, you're not."*  (7)
     * Is Abner in fact Al Capp's Li'l Abner? Is Ma actually Capp's Mammy Yokum? You decide.

The Black Pearl’s bearing's nor' by east. What's Britney's bourn? Big Ben. 
There's been no doubting if she'll dock: the question's been but when.  (7+3)
     * The familiar Miss Spears or some wannabe? Difficult to determine.

Cole cruises 'board the Caine. His port o' call? Rome’s Colosseum. 
Cole credits Christian martyrs. ('Course he'd never choose to be ‘em.)  (7+3)
     * No one would ever consider Porter the martyr type.

Dawn Treader's Captain Drinian's Dev's former mate -- and mine. 
Dev, sailing to the Duomo, dodges Davy Jones's brine.  (7) 
     * Patel reportedly has long harbored a desire to visit Florence.

Ehrlich's Eigenstrasse, on the eve o' World War II, 
bears Elsa to the Tour Eiffel with Eve 'n' me...et vous?  (7)  
     * In this version of "The Sea Chase," John Wayne's Ehrlich and Lana Turner's Elsa take a detour to Le Tour.

The Flying Dutchman ferries Fats to Lloyd Wright's Fallingwater. 
His wish? To ferry Frank as well. "F**k! Dad's dead," fumes Frank's daughter.  (7+2)
     * Domino or Waller? Either could provide wonderful shipboard entertainment. 

With Gene 'n' Garfield (not the Goose), the Ghost, with Edward G.
(not Gomer*) drops her gangplank at the Guggenheim: Goll-ee-ee!  (7+2)
     * Gene Lockhart, John Garfield and Edward G. Robinson (the latter well-known for his art collecting) all shipped aboard the Ghost in Hollywood's "The Sea Wolf." Garfield Goose and Gomer Pyle didn't.

Hergé's aboard the Henrietta, headin' for the Hague.
How many hogsheads holds her hold? Alas, the number's vague. (7+2)
     * The vessel which ferries Fogg and company across the Atlantic on the last leg of their storied journey around the world.

If I'd intend to stow away, th'Intrepid I'd ignore.
It's port's the inukshuk at Igloolik. I'll stay on shore. (7+3)

Jenny/Juliet's Balcony

Karaboudjan/Khor Virap 

Lollipop/Leaning Tower of Pisa

Mary Deare/Machu Pichu

Nautilus/Notre Dame de Paris

Orca/Old Post Office Pavilion...

Pequod/ Pantheon (Parthenon...

Q-boat/Quansuh al Guhra

Red October/Robie House

Sea Unicorn/Sidney Opera House

Titanic/Taj Mahal

Ulysses/Urquhart Castle

Venture/Versailles

We're Here/Windsor Castle

Xenophon/Xunantunich

Yellow Submarine/Yaxchilan

Zodiac/Ziggurat of Ur