We recite ומפליא לעשות multiple times a day. We can contemplate the greatness of הקב”ה without stepping outside as well. Do we?
Hashem created a beautiful world, with much to impress us of His greatness. If anyone has the slightest hesitation about this, open a Tehilim to פרק ק”ד, which we know as ברכי נפשי, recited on Rosh Chodesh and other times. מה רבו מעשיך ה’ כולם בחכמה עשית.