Escape the heat and visit a tea plantation in the rolling hills of the Cameron Highlands.

The British colonial city of Ipoh had humble beginnings, but has blossomed into a beautiful cityscape that marries old-world charm with modern amenities. This is a foodie's city, offering endless street stalls and restaurants all eager to serve up a sample of mouthwatering local fare. Walk it all off on a jaunt through breathtaking limestone caves that seem carved by the capable hands of a higher power.

Johor Bahru is the second-largest city in Malaysia and, with the opening of two major amusement parks in 2012, it is poised to become a major tourist destination. TripAdvisor travellers also recommend visiting the Arulmigu Sri Rajakaliamman Glass Temple, a unique Hindu temple decorated with brilliant glass mosaics.

Singapore is known as a bustling metropolis that also happens to be one of the cleanest and safest cities of its size in the world. (Just make sure you heed the local laws—something like spitting in the street might merely be considered rude in your hometown, but here, it carries a severe penalty.) You'll find historic sites like the Thian Hock Keng temple, superlative shopping (including gargantuan malls) and numerous beaches.

Famed throughout Asia for its heady mix of eastern cultures, Penang Island is Malaysia’s prime melting pot. Roadside vendors serve some of the world’s best street food; its national parks offer white-sand beaches and wildlife; and UNESCO-listed George Town is full of colorful heritage houses.

Forested hills, romantic white-sand beaches and crystal-clear waters greet visitors to tropical Palau Langkawi, the largest of the 99 islands in Langkawi archipelago. Known mysteriously as "Legendary Island" because of myths associated with its ancient geological formations, it drifts serenely alongside Malaysia in the azure Andaman Sea. Sample local cuisine at the night markets, hike to dramatic waterfalls or dive into an underwater marine park to take a guided glimpse at life beneath the sea.

Kuching is a fine choice for an enriching vacation that's as packed with learning as it is leisure. Its many museums and impressive planetarium will enthrall even the tiniest travelers, and a quick climb to the top of the Kuching Civic Center will reward you with jaw-dropping 360-degree views. Grab a snack from a stall on the bustling waterfront, and don't miss the absolutely massive Sunday market, which is an electric experience for shoppers, vendors, and observers.

Bangkok is full of exquisitely decorated Buddhist temples—as you go from one to the next you’ll be continually blown away by the craftsmanship and elabourate details. But if you’d rather seek enlightenment in a gourmet meal, or dance the night away, you’ll also enjoy Bangkok—the restaurant and nightclub scenes here are among the best in the world.

Kota Kinabalu on the island of Borneo is the bustling gateway to acclaimed Kinabalu National Park. The park's high point is 13,400-foot Mount Kinabula, Malaysia's tallest peak, a mecca for climbers. Ninety miles away, thrilling jungle trekking and camping await in the Crocker Range National Park.

The prophet Mohammed's birthplace is Islam's spiritual center and is strictly off-limits to non-Muslims. The pillars of Islam state that all Muslims with the means must undertake Hajj, a pilgrimage to Mecca, once in their lifetime. Those who visit the holy city are rewarded not just by proximity to landmarks and religious sites crucial to the religion, such as the Masjid Al Haram (Holy Mosque), the Mountain of Light, the Black Stone and the Well of Zamzam, but with the forgiveness of all their sins.