Cruises are good; cruises with a pool table that levels itself as the ship rolls are awesome.
Here are some of the best gimmicks -- which we're defining as not strictly necessary but nevertheless fun things -- to be found in the travel world today.
What great innovations have you noticed on your travels? Tell us below.
Gyroscopic pool table: Royal Caribbean Radiance of the Seas
Royal Caribbean's Radiance of the Seas has the perfect solution for those considering a game of pool in rough seas.
Its gyroscopic pool table has what's known as gyroscopic self-correcting underpinnings, which means that, in rough seas, when the boat tilts one way, the pool table tilts the other to keep everything on the level.
Radiance of the Seas; from $1,155 for 11-night South Pacific cruise
Intelligent elevator: QT Hotel, Sydney, Australia
Traveling between hotel floors is an interactive experience at Sydney's QT Hotel.
The hi-tech elevator uses sensors to work out how many people are in the elevator and plays a relevant song from its extensive discography.
If you're in the elevator alone, "Are you lonesome tonight?" might play, while groups of three or more will hear party anthems such as Kool and the Gang's "Celebration."
QT Hotel, 49 Market St., Sydney; +61 2 8262 0000; from $348 per night
Glass-bottomed pool: Holiday Inn Shanghai Kangqiao, Shanghai, China
Most people probably don't want the whole world to watch them swimming laps, but visitors going for a swim at the Holiday Inn Shanghai Kangqiao don't have a choice.
The glass-bottomed pool on the 24th floor measures 30 meters (98 feet) in length and half of the pool protrudes out from the building over the street below.
Holiday Inn Shanghai, 899 Dongfang Road, Pudong, Shanghai, China; +86 21 5830 6666; from $110 per night
Blue screen hotel room: Blue Line room at the Gladstone Hotel, Toronto
The Blue Line room's walls are adorned with silhouettes of scantily clad women and cowboys against bright blue walls.
However, it's no ordinary blue. The shade is chroma-key blue, the color used for blue screens, allowing guests to video themselves against the walls and digitally insert their own backdrops at a later date.
Other rooms include the Felt Room, which resembles a sound-proofed chamber, and the Canadiana room, which has enormous forest murals.
Gladstone Hotel, 1214 Queen St. W, Toronto, Ontario; +1 416 531 4635; from $202 per night
Hotel Montaña Magica, Los Rios, Chile
This Chilean hotel is so strange that it's hard to know where to begin.
For starters, it's a circular, volcano-shaped hotel in the middle of the jungle.
It's also covered with greenery, and at various points throughout the day it erupts, causing water to cascade down the side of the hotel.